Rename clang to clang-cc.

Tests and drivers updated, still need to shuffle dirs.

llvm-svn: 67602
diff --git a/clang/test/CodeGen/constructor-attribute.c b/clang/test/CodeGen/constructor-attribute.c
index f75fa4f..9a1fa76 100644
--- a/clang/test/CodeGen/constructor-attribute.c
+++ b/clang/test/CodeGen/constructor-attribute.c
@@ -1,4 +1,4 @@
-// RUN: clang -emit-llvm -o %t %s &&
+// RUN: clang-cc -emit-llvm -o %t %s &&
 // RUN: grep -e "global_ctors.*@A" %t &&
 // RUN: grep -e "global_dtors.*@B" %t &&
 // RUN: grep -e "global_ctors.*@C" %t &&