bug#48119: theorafile bundles libvorbis and other Xiph.org libraries

[Maxime Devos]

See <https://github.com/FNA-XNA/Theorafile/blob/master/Makefile#L55>,
and compare with <https://gitlab.xiph.org/xiph/vorbis/-/tree/master/lib>.

Greetings,
Maxime.

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