Renamed pth_barrier.stderr.exp into pth_barrier.stderr.exp-thread2.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7458

diff --git a/exp-drd/tests/pth_barrier.stderr.exp b/exp-drd/tests/pth_barrier.stderr.exp-thread2
similarity index 100%
rename from exp-drd/tests/pth_barrier.stderr.exp
rename to exp-drd/tests/pth_barrier.stderr.exp-thread2