update doc/libogg in libogg.spec.in, as reported by thosmos in #vorbis
update doc/libogg in libogg.spec.in, as reported by thosmos in #vorbis

svn path=/trunk/ogg/; revision=14109

eidy/libogg,nicolaichuk/ogg,ShiftMediaProject/ogg,ShiftMediaProject/ogg,emscripten-ports/Ogg,ksophocleous/ogg,mwgoldsmith/ogg,eidy/libogg,felipebetancur/ogg,emscripten-ports/Ogg,brion/ogg,youfearm3/ogg,ksophocleous/ogg,mwgoldsmith/ogg,xiph/ogg,felipebetancur/ogg,youfearm3/ogg,xiph/ogg,brion/ogg,nicolaichuk/ogg