Re-enabled the regression tests tc17_sembar and tc23_bogus_condwait for DRD on Darwin.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@10630 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/drd/tests/tc23_bogus_condwait.vgtest b/drd/tests/tc23_bogus_condwait.vgtest
index 87c5a8a..edbbef7 100644
--- a/drd/tests/tc23_bogus_condwait.vgtest
+++ b/drd/tests/tc23_bogus_condwait.vgtest
@@ -1,3 +1,3 @@
-prereq: ./supported_libpthread && ./supported_sem_init
+prereq: ./supported_libpthread
 vgopts: --num-callers=3
 prog: ../../helgrind/tests/tc23_bogus_condwait