Bug 870565 - Run all of comm-central's build system from mozilla-central, part 1: do the conversion, r=Standard8
Bug 870565 - Run all of comm-central's build system from mozilla-central, part 2: use the correct config.status to reconfigure, r=Standard8

Pushing this even though SeaMonkey has a CLOSED TREE, because all I changed was
suite/app.mozbuild (and I tested locally).