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/CodeCompletion/using.cpp b/test/CodeCompletion/using.cpp
index 305afda..ba4c9ce 100644
--- a/test/CodeCompletion/using.cpp
+++ b/test/CodeCompletion/using.cpp
@@ -14,7 +14,7 @@
     int N3;
     
     using
-    // RUN: clang-cc -fsyntax-only -code-completion-at=%s:16:10 %s -o - | FileCheck -check-prefix=CC1 %s
+    // RUN: %clang_cc1 -fsyntax-only -code-completion-at=%s:16:10 %s -o - | FileCheck -check-prefix=CC1 %s
     // CHECK-CC1: I1 : 2
     // CHECK-CC1: I4 : 2
     // CHECK-CC1: I5 : 2