add mess, mess-tiny, mame-tiny targets
add ume
fix libretro.dll name
add MAME/MESS rebuild options
(MSVC) Update libretro-build-win.sh
(libretro-build-win.sh) Add Picodrive
Update libretro-build-common-xdk.sh
Merge remote-tracking branch 'upstream/master'
Build MAME/MESS/UME 32bit & 64bit for Linux and WIndows
Merge pull request #50 from lordashram/master

 	Build MAME/MESS/UME 32bit & 64bit for Linux and WIndows