Filter tuning such that the annotate_barrier test does now pass on Darwin too.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11120 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/drd/tests/filter_stderr b/drd/tests/filter_stderr
index effd43d..0905a30 100755
--- a/drd/tests/filter_stderr
+++ b/drd/tests/filter_stderr
@@ -2,6 +2,8 @@
 
 dir=`dirname $0`
 
+sed -e "s:_pthread_start (in /usr/lib/libSystem.B.dylib):(within libpthread-?.?.so):" |
+
 $dir/../../tests/filter_stderr_basic |
 
 # Remove "drd, ..." line and the following copyright line.