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/Sema/bitfield-layout.c b/test/Sema/bitfield-layout.c
index 4405c80..edc44bd 100644
--- a/test/Sema/bitfield-layout.c
+++ b/test/Sema/bitfield-layout.c
@@ -1,4 +1,4 @@
-// RUN: clang-cc %s -fsyntax-only -verify -triple=i686-apple-darwin9
+// RUN: %clang_cc1 %s -fsyntax-only -verify -triple=i686-apple-darwin9
 
 #define CHECK_SIZE(kind, name, size) extern int name##1[sizeof(kind name) == size ? 1 : -1];
 #define CHECK_ALIGN(kind, name, size) extern int name##2[__alignof(kind name) == size ? 1 : -1];