build-tools/glib-tools: use binary mode for gengiotypefuncs.py
build-tools/glib-tools: use binary mode for gengiotypefuncs.py

Allows cerbero bootstrap over ssh

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