plugins: add magic values for all previously supported ABIs (and a couple of new ones) to mumble_plugin.h.
plugins: add magic values for all previously supported ABIs (and a couple of new ones) to mumble_plugin.h.

Add all previous magic values we've used since at least 1.2.0.
(Though I think the MUMBLE_PLUGIN_MAGIC value for MSVS2008 x86
goes back even further!)

This also adds a new magic value for the MSVS2013 x64 ABI, and
a generic default for "unsupported" ABIs.

Unsupported in this context means platforms/ABIs that we aren't
distributing plugins for via the auto-update mechanism. Those
platforms typically only have a single plugin, which is the
"link" plugin distributed with Mumble itself.

mbax/mumble,feld/mumble,austinliou/mumble,Lartza/mumble,SuperNascher/mumble,niko20010/mumble,mbax/mumble,austinliou/mumble,Githlar/mumble,Githlar/mumble,LuAPi/mumble,LuAPi/mumble,Lartza/mumble,austinliou/mumble,bheart/mumble,richard227/mumble,Zopieux/mumble,mbax/mumble,richard227/mumble,Githlar/mumble,Keridos/mumble,LuAPi/mumble,SuperNascher/mumble,bheart/mumble,Lartza/mumble,Natenom/mumble,mbax/mumble,Lartza/mumble,Githlar/mumble,unascribed/mumble,richard227/mumble,ccpgames/mumble,LuAPi/mumble,austinliou/mumble,ccpgames/mumble,Keridos/mumble,bheart/mumble,richard227/mumble,bheart/mumble,Keridos/mumble,SuperNascher/mumble,niko20010/mumble,richard227/mumble,Keridos/mumble,niko20010/mumble,feld/mumble,LuAPi/mumble,Githlar/mumble,feld/mumble,Natenom/mumble,ccpgames/mumble,Zopieux/mumble,Natenom/mumble,Githlar/mumble,unascribed/mumble,feld/mumble,SuperNascher/mumble,richard227/mumble,Lartza/mumble,niko20010/mumble,Zopieux/mumble,unascribed/mumble,bheart/mumble,Natenom/mumble,Natenom/mumble,Keridos/mumble,richard227/mumble,ccpgames/mumble,Keridos/mumble,Keridos/mumble,austinliou/mumble,mbax/mumble,ccpgames/mumble,SuperNascher/mumble,Zopieux/mumble,LuAPi/mumble,ccpgames/mumble,SuperNascher/mumble,Zopieux/mumble,feld/mumble,LuAPi/mumble,Lartza/mumble,Zopieux/mumble,Natenom/mumble,Githlar/mumble,austinliou/mumble,niko20010/mumble,LuAPi/mumble,Zopieux/mumble,unascribed/mumble,niko20010/mumble,ccpgames/mumble,SuperNascher/mumble,feld/mumble,unascribed/mumble,feld/mumble,bheart/mumble,niko20010/mumble,unascribed/mumble,Natenom/mumble,bheart/mumble,unascribed/mumble,mbax/mumble,richard227/mumble,Natenom/mumble,mbax/mumble,Lartza/mumble,unascribed/mumble,austinliou/mumble,feld/mumble,mbax/mumble,LuAPi/mumble,Zopieux/mumble,niko20010/mumble,SuperNascher/mumble,ccpgames/mumble,bheart/mumble,Githlar/mumble,SuperNascher/mumble,Keridos/mumble,Lartza/mumble,austinliou/mumble