MinGW: Define __stdcall&co when -fms-extensions is disabled

This is for compatibility with GCC.

Reviewers: asl

Differential Revision: http://reviews.llvm.org/D3444

llvm-svn: 206791
diff --git a/clang/test/SemaCXX/decl-microsoft-call-conv.cpp b/clang/test/SemaCXX/decl-microsoft-call-conv.cpp
index 4282047..eb6c850 100644
--- a/clang/test/SemaCXX/decl-microsoft-call-conv.cpp
+++ b/clang/test/SemaCXX/decl-microsoft-call-conv.cpp
@@ -1,4 +1,6 @@
 // RUN: %clang_cc1 -triple i686-pc-win32 -fms-extensions -verify %s
+// RUN: %clang_cc1 -triple i686-pc-mingw32 -verify %s
+// RUN: %clang_cc1 -triple i686-pc-mingw32 -fms-extensions -verify %s
 
 typedef void void_fun_t();
 typedef void __cdecl cdecl_fun_t();