build: Depend on GIO
build: Depend on GIO

GIO is used by pinpoint, let's add it to the deps.

bpeel/pinpoint,nzjrs/pinpoint,robclark/pinpoint,tyll/pinpoint,robclark/pinpoint,potofcoffee/pinpoint,robclark/pinpoint,michaelgwood/pinpoint,nekohayo/pinpoint,danigm/pinpoint,tyll/pinpoint,bpeel/pinpoint,potofcoffee/pinpoint,nekohayo/pinpoint,nzjrs/pinpoint,GNOME/pinpoint,michaelgwood/pinpoint,GNOME/pinpoint,danigm/pinpoint