Correctly detect subproject update failure
Correctly detect subproject update failure

pfalcon/fdroidserver,fdroidtravis/fdroidserver,fantastico/fdroidserver,f-droid/fdroid-server,fantastico/fdroidserver,fdroidtravis/fdroidserver,f-droid/fdroid-server,pfalcon/fdroidserver,fdroidtravis/fdroidserver,f-droid/fdroid-server,OneEducation/AppUniverse_Server,f-droid/fdroidserver,pfalcon/fdroidserver,matlink/fdroidserver,fantastico/fdroidserver,f-droid/fdroid-server,OneEducation/AppUniverse_Server,fantastico/fdroidserver,OneEducation/AppUniverse_Server,pfalcon/fdroidserver,matlink/fdroidserver,f-droid/fdroidserver,fdroidtravis/fdroidserver,f-droid/fdroidserver,f-droid/fdroidserver,matlink/fdroidserver,fantastico/fdroidserver,matlink/fdroidserver,pfalcon/fdroidserver,OneEducation/AppUniverse_Server,f-droid/fdroidserver,matlink/fdroidserver,f-droid/fdroid-server,OneEducation/AppUniverse_Server