fix bogus run line.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@54940 91177308-0d34-0410-b5e6-96231b3b80d8

test/Misc/diag-checker.c

@@ -1,4 +1,4 @@
-// RUN: clang -parse-ast -verify %s
+// RUN: clang -fsyntax-only -verify %s
 
 #include <stdio.h>