gold patch committed: Use semaphores instead of mutexes in tls_test

[Ian Lance Taylor]

The TLS test in the gold testsuite assumes that one thread can unlock a
mutex locked by a different thread.  This works on GNU/Linux but
reportedly fails on DragonFly.  POSIX does not guarantee that it works.
So I changed to test to use semaphores, as follows.  Committed to
mainline.

Ian


2011-05-16  Ian Lance Taylor  <iant@google.com>

	* testsuite/tls_test_main.cc: Use semaphores instead of mutexes.


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