[Droid x86] Additions for Android x86 architecture

Sorry, but I'm very new to this pull request thing. Sending the request form my branch to Memphiz's droid-x86 branch shows too many changes, that's why I decided  to send it to the original xbmc repo. (I hope this is right)
Original discussion and pull request: https://github.com/xbmc/xbmc/pull/3098
And forum thread: http://forum.xbmc.org/showthread.php?tid=173313

My changes disables the neon check on Android x86 architecture and renames the lib\<arch> folder of the android apk (has to be x86 and not i686)