Mumble.xcodeproj: make 'Info.plist Extras' safe for build dirs with spaces in them.
Mumble.xcodeproj: make 'Info.plist Extras' safe for build dirs with spaces in them.

HiroshiTakayama/IP-Incom,jinie/mumble-iphoneos,HiroshiTakayama/IP-Incom,mumble-voip/mumble-iphoneos,mumble-voip/mumble-iphoneos,HiroshiTakayama/IP-Incom,mumble-voip/mumble-iphoneos,HiroshiTakayama/IP-Incom,jinie/mumble-iphoneos,jinie/mumble-iphoneos