remove ADRENO_ROTATION_HACK

and introduce a config value (rotate) for haveing different possible rotation angles

also added later:

rename config value rotate to Rotate and move it to the video general section.

also introduce a new Makefile parameter CFG_DEFAULTS which can be used to select which config settings should be used by default (currently only for the jolla phone where Rotate=3, aspect=2 and Screen{Width,Height}={540,960} is required to properly render the game)

the second commit should have probably have been split up into two seperate ones, if i should do it please tell me