don't build libtheora spec
don't build libtheora spec

no need to build the spec, plus on debian, it often fails to build
with:

/cmti7.pfb></usr/share/texlive/texmf-dist/fonts/type1/public/amsfonts/cm/cmtt10
.pfb>
Output written on spec.pdf (202 pages, 650157 bytes).
Transcript written on spec.log.
Makefile:454: recipe for target 'Theora.pdf' failed
make[3]: *** [Theora.pdf] Error 1
make[3]: Leaving directory '/home/jason/source/ffmpeg-build-script/packages/libtheora-1.1.1/doc/spec'
Makefile:236: recipe for target 'all-recursive' failed
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory '/home/jason/source/ffmpeg-build-script/packages/libtheora-1.1.1/doc'
Makefile:291: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/home/jason/source/ffmpeg-build-script/packages/libtheora-1.1.1'
Makefile:205: recipe for target 'all' failed
make: *** [all] Error 2

Failed to Execute make -j 16

markus-perl/ffmpeg-build-script