Also fix the warning about using "clang" instead of %clang.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133492 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Driver/noexecstack.c b/test/Driver/noexecstack.c
index df7da46..7431a19 100644
--- a/test/Driver/noexecstack.c
+++ b/test/Driver/noexecstack.c
@@ -1 +1 @@
-// RUN: clang -### %s -c -o tmp.o -Wa,--noexecstack | grep "mnoexecstack"
+// RUN: %clang -### %s -c -o tmp.o -Wa,--noexecstack 2>&1 | grep "mnoexecstack"