DRD: Add test program for std::thread.

To do: document _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE/AFTER in the DRD manual.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12284 a5019735-40e9-0310-863c-91ae7b9d1cf9
5 files changed