Linux (gtk): Add preliminary AV recording with x264 and flac.


git-svn-id: https://svn.code.sf.net/p/desmume/code/trunk@4992 5577840e-afb3-4e59-9ef3-2b7f898b1952
Linux (gtk): Fix foolish typos.


git-svn-id: https://svn.code.sf.net/p/desmume/code/trunk@4993 5577840e-afb3-4e59-9ef3-2b7f898b1952