Introduce an opt-in warning indicating when the compiler is treating
an #include/#import as a module import.

llvm-svn: 145500
diff --git a/clang/test/Modules/auto-module-import.c b/clang/test/Modules/auto-module-import.c
index 1dda642..a161f33 100644
--- a/clang/test/Modules/auto-module-import.c
+++ b/clang/test/Modules/auto-module-import.c
@@ -1,8 +1,8 @@
 
 // RUN: rm -rf %t
-// RUN: %clang_cc1 -x objective-c -fmodule-cache-path %t -fauto-module-import -F %S/Inputs %s -verify
+// RUN: %clang_cc1 -x objective-c -Wauto-import -fmodule-cache-path %t -fauto-module-import -F %S/Inputs %s -verify
 
-#include <DependsOnModule/DependsOnModule.h>
+#include <DependsOnModule/DependsOnModule.h> // expected-warning{{treating #include as an import of module 'DependsOnModule'}}
 
 #ifdef MODULE_H_MACRO
 #  error MODULE_H_MACRO should have been hidden