Add new FFT implementation.

To be used for EQ implementation.
Begin implementing EQ.
Implement more of EQ.
Equalizer works.
Read config in EQ.
Some fixes to EQ.
Add EQ to griffin.
Merge branch 'master' of github.com:libretro/RetroArch into eq-dsp

Conflicts:
	griffin/griffin.c
Fix Android build.
Merge pull request #715 from libretro/eq-dsp

EQ DSP