* audio_core: dsp_hle: implements fdk_aac decoder
* audio_core: dsp_hle: clean up and add comments
* audio_core: dsp_hle: move fdk include to cpp file
* audio_core: dsp_hle: detects broken fdk_aac...
... and refuses to initialize if that's the case
* audio_core: dsp_hle: fdk_aac: address comments...
... and rebase commits
* fdk_decoder: move fdk header to cpp file
