build-tools: mingw-regex: use https:// for git repo
build-tools: mingw-regex: use https:// for git repo

https://bugzilla.gnome.org/show_bug.cgi?id=743235

GStreamer/cerbero,fluendo/cerbero,atsushieno/cerbero,GStreamer/cerbero,GStreamer/cerbero,centricular/cerbero,centricular/cerbero,atsushieno/cerbero,fluendo/cerbero,fluendo/cerbero,atsushieno/cerbero,centricular/cerbero,nirbheek/cerbero,centricular/cerbero,GStreamer/cerbero,nirbheek/cerbero,GStreamer/cerbero,nirbheek/cerbero,nirbheek/cerbero,centricular/cerbero,atsushieno/cerbero,atsushieno/cerbero,fluendo/cerbero,fluendo/cerbero