Update tests to use %clang_cc1 instead of 'clang-cc' or 'clang -cc1'.
 - This is designed to make it obvious that %clang_cc1 is a "test variable"
   which is substituted. It is '%clang_cc1' instead of '%clang -cc1' because it
   can be useful to redefine what gets run as 'clang -cc1' (for example, to set
   a default target).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91446 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGenCXX/default-constructor-default-argument.cpp b/test/CodeGenCXX/default-constructor-default-argument.cpp
index f53732e..971757d 100644
--- a/test/CodeGenCXX/default-constructor-default-argument.cpp
+++ b/test/CodeGenCXX/default-constructor-default-argument.cpp
@@ -1,4 +1,4 @@
-// RUN: clang-cc %s -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s
 
 // Check that call to constructor for struct A is generated correctly.
 struct A { A(int x = 2); };