convert test to use -verify
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71642 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Preprocessor/_Pragma.c b/test/Preprocessor/_Pragma.c
index 44eda5f..d449dc0 100644
--- a/test/Preprocessor/_Pragma.c
+++ b/test/Preprocessor/_Pragma.c
@@ -1,4 +1,4 @@
-// RUN: clang-cc %s -E 2>&1 | grep 'system_header ignored in main file'
+// RUN: clang-cc %s -E -verify
-_Pragma ("GCC system_header")
+_Pragma ("GCC system_header") // expected-warning {{system_header ignored in main file}}