partially fix immediate rvalues

The code generation previously assumed a reference could not alter the
value in a way the destructor would notice. This is an incorrect
assumption for `&mut`, and is also incorrect for an `&` pointer to a
non-`Freeze` type.

Closes #7972
auto merge of #9902 : thestinger/rust/immediate, r=nikomatsakis

The code generation previously assumed a reference could not alter the
value in a way the destructor would notice. This is an incorrect
assumption for `&mut`, and is also incorrect for an `&` pointer to a
non-`Freeze` type.

Closes #7972
rm rusti from `Makefile.in`
auto merge of #9915 : thestinger/rust/rusti, r=thestinger
rustdoc: Don't treat "super" specially for urls

This was just incorrectly handled before, the path component shouldn't be looked
at at all (we used absolute paths everywhere instead of relative to the current
module location).

Closes #9861
std: Move size/align functions to std::mem. #2240
auto merge of #9916 : alexcrichton/rust/issue-9861, r=brson

This was just incorrectly handled before, the path component shouldn't be looked
at at all (we used absolute paths everywhere instead of relative to the current
module location).

Closes #9861
auto merge of #9896 : brson/rust/stdmem, r=alexcrichton

This is progress toward removing std::sys.