Rename clang to clang-cc.

Tests and drivers updated, still need to shuffle dirs.

llvm-svn: 67602
diff --git a/clang/test/SemaCXX/converting-constructor.cpp b/clang/test/SemaCXX/converting-constructor.cpp
index edded17..59b793e 100644
--- a/clang/test/SemaCXX/converting-constructor.cpp
+++ b/clang/test/SemaCXX/converting-constructor.cpp
@@ -1,4 +1,4 @@
-// RUN: clang -fsyntax-only -verify %s 
+// RUN: clang-cc -fsyntax-only -verify %s 
 class Z { };
 
 class Y {