Rename clang to clang-cc.

Tests and drivers updated, still need to shuffle dirs.

llvm-svn: 67602
diff --git a/clang/test/Rewriter/method-encoding-1.m b/clang/test/Rewriter/method-encoding-1.m
index 6559c6b..25dccbf 100644
--- a/clang/test/Rewriter/method-encoding-1.m
+++ b/clang/test/Rewriter/method-encoding-1.m
@@ -1,4 +1,4 @@
-// RUN: clang -rewrite-objc %s -o=-
+// RUN: clang-cc -rewrite-objc %s -o=-
 
 @protocol P1
 - (void) MyProtoMeth : (int **) arg1 : (void*) arg2;