[Mingw-cross-env-list] libffi, GTK3

[LM]

Was looking at the mk file for libffi.  Might want to make the following change:

https://bitbucket.org/vog/mingw-cross-env/src/0cb57f323a5b/src/libffi.mk
line 16:
wget -q --no-check-certificate -O- 'http://github.com/atgreen/libffi/tags' | \

change to:
wget -q --no-check-certificate -O- 'https://github.com/atgreen/libffi/tags' | \

I wasn't getting a response using just http: instead of https:  Not
sure if it's just my connection or if it would be an issue for
everyone else too, but thought it was worth mentioning.

Am looking into attempting to build gtk3 for Windows.  Am curious if
anyone else is considering building/using it or if everyone's pretty
much sticking with gtk2 for now.

Sincerely,
Laura