Patch needed to let linker find lto plugin

Recently the meta-mingw layer was updated to krogoth by Juro Bystricky. Thanks ! However when I build it as-is, the linker fails because it can't load the lto plugin.

After applying commit a06e473590207f72b11d273a09de2c8a889c381e from meta-mingw-contrib (by Mark Hatle), the error disappeared.

See: http://git.yoctoproject.org/cgit/cgit.cgi/meta-mingw-contrib/commit/?h=mgh/jetho/meta-mingw&id=a06e473590207f72b11d273a09de2c8a889c381e

I think this patch needs to be applied also to the meta-mingw main repository.

regards,
W. Dobbe