Fixed cflags for PSC build (#281)

*  Committer: Wes Smith <wraith@smithmedia.wraithbox.com>

 On branch master
 Your branch is up to date with 'origin/master'.

 Changes to be committed:
	modified:   Makefile.libretro

Added v8a35 to Makefile

* modified makefile with libretro changes

* New makefile format from libretro

* Updated with PSClassic Make again

* Updated PSC config

* Fix compile flags

Re-add optimizations, -mtune