Janus WebRTC server upstream added fix for cross-compilation

[igo95862 at yandex.ru]

I am writting you because debian already had a fix for 
cross-compilation:

https://sources.debian.org/src/janus/0.11.2-1/debian/patches/1004_support_cross-compilation.patch/

I think it would conflict with new upstream fix.

This is Janus upstream issue that made the fix included:

https://github.com/meetecho/janus-gateway/issues/2713