Rename clang to clang-cc.

Tests and drivers updated, still need to shuffle dirs.

llvm-svn: 67602
diff --git a/clang/test/Sema/function-redecl.c b/clang/test/Sema/function-redecl.c
index fc2e199..28593b0 100644
--- a/clang/test/Sema/function-redecl.c
+++ b/clang/test/Sema/function-redecl.c
@@ -1,4 +1,4 @@
-// RUN: clang -fsyntax-only -verify %s
+// RUN: clang-cc -fsyntax-only -verify %s
 
 // PR3588
 void g0(int, int);