Update tests to use %clang_cc1 instead of 'clang-cc' or 'clang -cc1'.
 - This is designed to make it obvious that %clang_cc1 is a "test variable"
   which is substituted. It is '%clang_cc1' instead of '%clang -cc1' because it
   can be useful to redefine what gets run as 'clang -cc1' (for example, to set
   a default target).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91446 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Preprocessor/expr_comma.c b/test/Preprocessor/expr_comma.c
index 88ceabf..538727d 100644
--- a/test/Preprocessor/expr_comma.c
+++ b/test/Preprocessor/expr_comma.c
@@ -1,8 +1,8 @@
 // Comma is not allowed in C89
-// RUN: not clang-cc -E %s -std=c89 -pedantic-errors
+// RUN: not %clang_cc1 -E %s -std=c89 -pedantic-errors
 
 // Comma is allowed if unevaluated in C99
-// RUN: clang-cc -E %s -std=c99 -pedantic-errors 
+// RUN: %clang_cc1 -E %s -std=c99 -pedantic-errors 
 
 // PR2279