ffmpeg2theora: add headerpad to prevent broken bottle
ffmpeg2theora: add headerpad to prevent broken bottle

Closes #49341.

Signed-off-by: Andrew Janke <02e0a999c50b1f88df7a8f5a04e1b76b35ea6a88@apjanke.net>

filcab/homebrew,filcab/homebrew,filcab/homebrew,filcab/homebrew