attempt to fix windows testers, which generate #line by default.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@131882 91177308-0d34-0410-b5e6-96231b3b80d8

test/Preprocessor/pragma_sysheader.c

@@ -1,5 +1,5 @@
 // RUN: %clang -verify -pedantic %s -fsyntax-only
-// RUN: %clang -E %s | FileCheck %s
+// RUN: %clang_cc1 -E %s | FileCheck %s
 // rdar://6899937
 #include "pragma_sysheader.h"