Change rmake and doc-test to support TESTNAME

Closes #11288
Closes #11222
std: adjust requested stack size for thread-local storage.

If there is a lot of data in thread-local storage some implementations
of pthreads (e.g. glibc) fail if you don't request a stack large enough
-- by adjusting for the minimum size we guarantee that our stacks are
always large enough. Issue #6233.
rt: Define exp10 on Android

LLVM appears to generate calls to exp10 on ARM and bionic does not
define it.
Fix ARM unwinding.
Add a stack_bounds function to the Runtime trait

This allows inspection of the current task's bounds regardless of what the
underlying task is.

Closes #11293
Fix android device detection when connected to a remote emulator (in this case device name contains ':').
Use $(CFG_ADB) for all adb invocations.
Restore Writer.write_char, see #10861.
etc: licenseck: don't hardcode a specific year
Don't allow single-variant enums to be dereferenced. #6246

I'm not sure if this was even intentional at this point.
Don't allow newtype structs to be dereferenced. #6246
rustc: Add error about obsolete struct deref
doc: Fix tutorial for struct deref
doc: Fix an inexplicable error in a tutorial example

This code was wrong but apparently worked before removing struct
deref. I don't know why.
Condition EH ABI on target_arch, not target_os.
More precise unwinder private data size specification.
Stop padding metadata

This is causing maybe_get_doc to fail when called at the top level of
the metadata and doesn't appear to be needed anymore.
Add lint for unnecessary casts