Visit type parameter in lifetime suggestion

Previously, Rebuilder did not visit type parameters when rebuilding
generics and path, so in some cases the suggestion turns out to be
erroneous.
Avoid injecting unfulfilled dependence in compiletest on libnative.
Two fixes to get `make check-stage1` working.

1. Fix a long-standing typo in the makefile: the relevant
   CTEST_NAME here is `rpass-full` (with a dash), not
   `rpass_full`.

2. The rpass-full tests depend on the complete set of target
   libraries.  Therefore, the rpass-full tests need to use
   the dependencies held in the CSREQ-prefixed variable, not
   the TLIBRUSTC_DEFAULT-prefixed variable.
Remove libc from std

These wrappers are bound to a specific libc, and they don't need to be part of
libstd.
Change how the readdir/opendir hack works
Fix fallout from std::libc separation
rustdoc: Fix hiding of private fields

The calculation for whether a field is public or private was tweaked in #13184,
but I forgot to update rustdoc.

Closes #13310
librustc: Improve error message for incompatible trait method signatures.
Make the fields of semver::Version public again.
auto merge of #13333 : Ryman/rust/improve_incompatible_type_error, r=alexcrichton

This can be a frustrating error message, ideally we should print the signature mismatch, but hinting that it's a trait incompatibility helps tracking root cause. Also beefed up the testcases for this.

Ideally we would print the signature mismatch in the error helper?
auto merge of #13339 : mozilla-servo/rust/semver-pub, r=cmr
Fix an unnecessary use of `cast::transmute`

Wherever possible, more specialized variants of said functions should be used,
such as in this case `cast::transmute_mmut_unsafe`.
auto merge of #13343 : tbu-/rust/pr_smallfix, r=pcwalton

Fix an unnecessary use of `cast::transmute`

Wherever possible, more specialized variants of said functions should be used,
such as in this case `cast::transmute_mmut_unsafe`.
Fix android problems with newly fixed rpass-full variable definition.

First, documented the existing `CTEST_DISABLE_$(TEST_GROUP)` pattern
for conditionally disabling tests based on missing host features.

Added variant of above, `CTEST_DISABLE_NONSELFHOST_$(TEST_GROUP)`,
which is only queried in contexts where the target is not on the
CFG_HOST list (which I interpret as the list of targets that our host
can compatibly emulate; e.g. the example that i686 and x86_64 can in
theory run each others' tests).

Driveby fix: Remove redundant copy of
check-stage$(1)-T-$(2)-H-$(3)-$(4)-exec dependency declaration.
auto merge of #13112 : ktt3ja/rust/issue-13058, r=pnkfelix

Previously, Rebuilder did not visit type parameters when rebuilding
generics and path, so in some cases the suggestion turns out to be
erroneous.
auto merge of #13260 : pnkfelix/rust/fsk-fix-13247, r=alexcrichton

Fix #13247.

r? @alexcrichton  (or anyone else, really).
rustc: Pass --enable-long-section-names to gcc

This was quite a curious bug on windows, and the details can be found in the
comment I added to src/librustc/back/link.rs
auto merge of #13319 : alexcrichton/rust/rustdoc-fields, r=brson

The calculation for whether a field is public or private was tweaked in #13184,
but I forgot to update rustdoc.

Closes #13310
syntax: Tweak parsing lifetime bounds on closures

In summary these are some example transitions this change makes:

    'a ||       => ||: 'a
    proc:Send() => proc():Send

The intended syntax for closures is to put the lifetime bound not at the front
but rather in the list of bounds. Currently there is no official support in the
AST for bounds that are not 'static, so this case is currently specially handled
in the parser to desugar to what the AST is expecting. Additionally, this moves
the bounds on procedures to the correct position, which is after the argument
list.

The current grammar for closures and procedures is:

    procedure := 'proc' [ '<' lifetime-list '>' ] '(' arg-list ')'
                        [ ':' bound-list ] [ '->' type ]
    closure := [ 'unsafe' ] ['<' lifetime-list '>' ] '|' arg-list '|'
                        [ ':' bound-list ] [ '->' type ]
    lifetime-list := lifetime | lifetime ',' lifetime-list
    arg-list := ident ':' type | ident ':' type ',' arg-list
    bound-list := bound | bound '+' bound-list
    bound := path | lifetime

This does not currently handle the << ambiguity in `Option<<'a>||>`, I am
deferring that to a later patch. Additionally, this removes the support for the
obsolete syntaxes of ~fn and &fn.

Closes #10553
Closes #10767
Closes #11209
Closes #11210
Closes #11211
auto merge of #13268 : alexcrichton/rust/parse-closure, r=cmr

In summary these are some example transitions this change makes:

    'a ||       => ||: 'a
    proc:Send() => proc():Send

The intended syntax for closures is to put the lifetime bound not at the front
but rather in the list of bounds. Currently there is no official support in the
AST for bounds that are not 'static, so this case is currently specially handled
in the parser to desugar to what the AST is expecting. Additionally, this moves
the bounds on procedures to the correct position, which is after the argument
list.

The current grammar for closures and procedures is:

    procedure := 'proc' [ '<' lifetime-list '>' ] '(' arg-list ')'
                        [ ':' bound-list ] [ '->' type ]
    closure := [ 'unsafe' ] ['<' lifetime-list '>' ] '|' arg-list '|'
                        [ ':' bound-list ] [ '->' type ]
    lifetime-list := lifetime | lifetime ',' lifetime-list
    arg-list := ident ':' type | ident ':' type ',' arg-list
    bound-list := bound | bound '+' bound-list
    bound := path | lifetime

This does not currently handle the << ambiguity in `Option<<'a>||>`, I am
deferring that to a later patch. Additionally, this removes the support for the
obsolete syntaxes of ~fn and &fn.

Closes #10553
Closes #10767 
Closes #11209
Closes #11210
Closes #11211