Rename clang to clang-cc.

Tests and drivers updated, still need to shuffle dirs.

llvm-svn: 67602
diff --git a/clang/test/SemaCXX/overload-call.cpp b/clang/test/SemaCXX/overload-call.cpp
index eed8223..94f352e 100644
--- a/clang/test/SemaCXX/overload-call.cpp
+++ b/clang/test/SemaCXX/overload-call.cpp
@@ -1,4 +1,4 @@
-// RUN: clang -fsyntax-only -pedantic -verify %s
+// RUN: clang-cc -fsyntax-only -pedantic -verify %s
 int* f(int) { return 0; }
 float* f(float) { return 0; }
 void f();