Rename clang to clang-cc.

Tests and drivers updated, still need to shuffle dirs.

llvm-svn: 67602
diff --git a/clang/test/Sema/const-eval.c b/clang/test/Sema/const-eval.c
index 03aeb2a..dd91c48 100644
--- a/clang/test/Sema/const-eval.c
+++ b/clang/test/Sema/const-eval.c
@@ -1,4 +1,4 @@
-// RUN: clang -fsyntax-only -verify %s
+// RUN: clang-cc -fsyntax-only -verify %s
 
 #define EVAL_EXPR(testno, expr) int test##testno = sizeof(struct{char qq[expr];});
 int x;