Rename clang to clang-cc.

Tests and drivers updated, still need to shuffle dirs.

llvm-svn: 67602
diff --git a/clang/test/SemaCXX/copy-initialization.cpp b/clang/test/SemaCXX/copy-initialization.cpp
index a56a886..5b1fbaa 100644
--- a/clang/test/SemaCXX/copy-initialization.cpp
+++ b/clang/test/SemaCXX/copy-initialization.cpp
@@ -1,4 +1,4 @@
-// RUN: clang -fsyntax-only -verify %s 
+// RUN: clang-cc -fsyntax-only -verify %s 
 class X {
 public:
   explicit X(const X&);