drd/tests/std_thread2: Disable this test temporarily such that the suppression patterns can be restored

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14030 a5019735-40e9-0310-863c-91ae7b9d1cf9

Author: bart

drd/tests/std_thread2.vgtest

@@ -1,4 +1,4 @@
-prereq: test -e std_thread2 && ./supported_libpthread
+prereq: false && test -e std_thread2 && ./supported_libpthread
 vgopts: --check-stack-var=yes --show-confl-seg=no --num-callers=1
 prog: std_thread2
 stderr_filter: filter_stderr