Rename clang to clang-cc.

Tests and drivers updated, still need to shuffle dirs.

llvm-svn: 67602
diff --git a/clang/test/CodeGen/init.c b/clang/test/CodeGen/init.c
index b53b81e..2e239cf 100644
--- a/clang/test/CodeGen/init.c
+++ b/clang/test/CodeGen/init.c
@@ -1,4 +1,4 @@
-// RUN: clang -triple i386-unknown-unknown -emit-llvm %s -o %t &&
+// RUN: clang-cc -triple i386-unknown-unknown -emit-llvm %s -o %t &&
 
 void f1() {
   // Scalars in braces.