Add runtime/bin/thread_fuchsia that binds to fuchsia's pthreads

Add runtime/bin/thread_fuchsia that binds to fuchsia's pthreads

Fuchsia provides pthreads so the linux implementation almost works
except that fuchsia does not (currently) provide the clock_gettime clock
for CLOCK_THREAD_CPUTIME_ID.

Committed: https://github.com/dart-lang/sdk/commit/0fae54022378e06920f6156a769f054fa1c6e3ed

[jamesr, 2016-07-14 20:04:56]

jamesr@chromium.org changed reviewers:
+ zra@google.com

[jamesr, 2016-07-14 20:05:21]

I think this *might* break the gyp build, but I don't have a way to verify it. 
The _fuchsia files should be excluded on non-GN builds

[zra, 2016-07-14 22:25:08]

Description was changed from

==========
Add runtime/bin/thread_fuchsia that binds to fuchsia's pthreads

Fuchsia provides pthreads so the linux implementation almost works
except that fuchsia does not (currently) provide the clock_gettime clock
for CLOCK_THREAD_CPUTIME_ID.
==========

to

==========
Add runtime/bin/thread_fuchsia that binds to fuchsia's pthreads

Fuchsia provides pthreads so the linux implementation almost works
except that fuchsia does not (currently) provide the clock_gettime clock
for CLOCK_THREAD_CPUTIME_ID.

Committed:
https://github.com/dart-lang/sdk/commit/0fae54022378e06920f6156a769f054fa1c6e3ed
==========

[zra, 2016-07-14 22:25:11]

Committed patchset #1 (id:1) manually as
0fae54022378e06920f6156a769f054fa1c6e3ed (presubmit successful).