Set pyoverrides dir to $(pyexecdir)/gi/overrides
Set pyoverrides dir to $(pyexecdir)/gi/overrides

Getting it from gi won't allow installing in a different prefix and
breaks things like distcheck

GNOME/libgit2-glib,chergert/libgit2-glib,weynhamz/GNOME-libgit2-glib,weynhamz/GNOME-libgit2-glib,chergert/libgit2-glib,GNOME/libgit2-glib,weynhamz/GNOME-libgit2-glib,chergert/libgit2-glib,weynhamz/GNOME-libgit2-glib