Update sbcelt submodule to include fix for Xiph.org's git:// -> https:// transition.
Update sbcelt submodule to include fix for Xiph.org's git:// -> https:// transition.

Lartza/mumble,niko20010/mumble,SuperNascher/mumble,unascribed/mumble,unascribed/mumble,feld/mumble,Lartza/mumble,austinliou/mumble,LuAPi/mumble,unascribed/mumble,Githlar/mumble,unascribed/mumble,richard227/mumble,niko20010/mumble,Lartza/mumble,Lartza/mumble,Githlar/mumble,niko20010/mumble,Githlar/mumble,niko20010/mumble,LuAPi/mumble,Lartza/mumble,SuperNascher/mumble,LuAPi/mumble,niko20010/mumble,Githlar/mumble,LuAPi/mumble,LuAPi/mumble,Lartza/mumble,SuperNascher/mumble,austinliou/mumble,SuperNascher/mumble,Lartza/mumble,SuperNascher/mumble,richard227/mumble,unascribed/mumble,feld/mumble,richard227/mumble,Lartza/mumble,Githlar/mumble,austinliou/mumble,LuAPi/mumble,richard227/mumble,LuAPi/mumble,feld/mumble,austinliou/mumble,unascribed/mumble,richard227/mumble,niko20010/mumble,niko20010/mumble,feld/mumble,austinliou/mumble,richard227/mumble,austinliou/mumble,SuperNascher/mumble,austinliou/mumble,Githlar/mumble,richard227/mumble,LuAPi/mumble,SuperNascher/mumble,feld/mumble,richard227/mumble,unascribed/mumble,niko20010/mumble,Githlar/mumble,Githlar/mumble,LuAPi/mumble,unascribed/mumble,austinliou/mumble,feld/mumble,feld/mumble,feld/mumble,SuperNascher/mumble,SuperNascher/mumble