Rename clang to clang-cc.

Tests and drivers updated, still need to shuffle dirs.

llvm-svn: 67602
diff --git a/clang/test/SemaCXX/decl-expr-ambiguity.cpp b/clang/test/SemaCXX/decl-expr-ambiguity.cpp
index 0cc9d7e..227834a 100644
--- a/clang/test/SemaCXX/decl-expr-ambiguity.cpp
+++ b/clang/test/SemaCXX/decl-expr-ambiguity.cpp
@@ -1,4 +1,4 @@
-// RUN: clang -fsyntax-only -verify -pedantic-errors %s 
+// RUN: clang-cc -fsyntax-only -verify -pedantic-errors %s 
 
 void f() {
   int a;