Rename clang to clang-cc.

Tests and drivers updated, still need to shuffle dirs.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67602 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Preprocessor/expr_comma.c b/test/Preprocessor/expr_comma.c
index e36f040..0a24bac 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 -E %s -std=c89 -pedantic-errors &&
+// RUN: not clang-cc -E %s -std=c89 -pedantic-errors &&
 
 // Comma is allowed if unevaluated in C99
-// RUN: clang -E %s -std=c99 -pedantic-errors 
+// RUN: clang-cc -E %s -std=c99 -pedantic-errors 
 
 // PR2279