add autogen.sh to the dist target for completeness
add autogen.sh to the dist target for completeness

svn path=/trunk/vorbis/; revision=2604

youfearm3/vorbis,eidy/vorbis,emscripten-ports/Vorbis,ksophocleous/vorbis,emscripten-ports/Vorbis,emscripten-ports/Vorbis,ShiftMediaProject/vorbis,nicolaichuk/vorbis,emscripten-ports/Vorbis,mwgoldsmith/vorbis,ShiftMediaProject/vorbis,nicolaichuk/vorbis,mwgoldsmith/vorbis,erikd/vorbis,youfearm3/vorbis,youfearm3/vorbis,eidy/vorbis,erikd/vorbis,felipebetancur/vorbis,mwgoldsmith/vorbis,felipebetancur/vorbis,felipebetancur/vorbis,nicolaichuk/vorbis,ShiftMediaProject/vorbis,mwgoldsmith/vorbis,eidy/vorbis,ksophocleous/vorbis,ShiftMediaProject/vorbis,erikd/vorbis,ShiftMediaProject/vorbis,youfearm3/vorbis,nicolaichuk/vorbis,eidy/vorbis,ksophocleous/vorbis,ksophocleous/vorbis,felipebetancur/vorbis,erikd/vorbis,ShiftMediaProject/vorbis