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/extension-warning.c b/test/Preprocessor/extension-warning.c
index c325c2f..00c9b87 100644
--- a/test/Preprocessor/extension-warning.c
+++ b/test/Preprocessor/extension-warning.c
@@ -1,4 +1,4 @@
-// RUN: clang -fsyntax-only -verify -pedantic %s
+// RUN: clang-cc -fsyntax-only -verify -pedantic %s
 
 // The preprocessor shouldn't warn about extensions within macro bodies that
 // aren't expanded.