Add /Zo to release flags for improved optimized build debugging
Add /Zo to release flags for improved optimized build debugging

Updated compiler.pri to make use of the new /Zo
option to improve our debugging capabilities on optimized
builds. This flag is officially supported since
Visual Studio 2013 Update 3.

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