Rename clang to clang-cc.

Tests and drivers updated, still need to shuffle dirs.

llvm-svn: 67602
diff --git a/clang/test/SemaCXX/namespace.cpp b/clang/test/SemaCXX/namespace.cpp
index ea7737e..24a0a46 100644
--- a/clang/test/SemaCXX/namespace.cpp
+++ b/clang/test/SemaCXX/namespace.cpp
@@ -1,4 +1,4 @@
-// RUN: clang -fsyntax-only -verify %s 
+// RUN: clang-cc -fsyntax-only -verify %s 
 namespace A { // expected-note 2 {{previous definition is here}}
   int A;
   void f() { A = 0; }