Travis reports false possitive while building with mingw

first I've noticed that Travis reports false positive for mingw builds. After fixing it (patch will be attached) I checked why it does not compile: some thrift compiler code uses C++11 features (which is good imho), but i586-mingw32msvc is veeeeery old compiler.

I started working on patch for Travis to run CI with newer version of cross compiler. But maybe i586-mingw32msvc is desired for some special purpose? Is it possible to update it?