Bump the library versioning in preparation for the 1.2.1 release.
Bump the library versioning in preparation for the 1.2.1 release.

svn path=/trunk/vorbis/; revision=14818

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