fix libretro-super build
Merge pull request #1 from fr500/master

fix libretro-super build
Libretro core should use zlib from the system, in linux build.
Merge pull request #2 from sergiobenrocha2/master

Libretro core should use zlib from the system, in linux build.
(Haiku) Fix build
Merge pull request #3 from heuripedes/master

(Haiku) Fix build
Update libretro.h
Update Makefile
Add input descriptors