Add libdirac

This is an adaption of EOS's
https://github.com/TeamEOS/external_libdirac/commit/2cc3110b7b335201010fb1cd27bdbaacd24e000b

Change-Id: I7470533741fa3cd980addca350de07c6eb508c98
Signed-off-by: DHOMD <DHO@dho.im>
Conflicts:
	cyanogen-dsp/Android.mk