Don't check lines beginning with '#', since they could contain a path with the unexpected word in them.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173307 91177308-0d34-0410-b5e6-96231b3b80d8

test/Preprocessor/disabled-cond-diags.c

@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -E %s 2>&1 | not grep "warning\|error"
+// RUN: %clang_cc1 -E %s 2>&1 | grep -v '^#' | not grep "warning\|error"
 
 #if 0