Otherwise it will pick it up when the system has the relevant headers,
and then linking produces an unusable plugin later as we don't ensure
that the plugin also links against the crystalhd library.
https://bugzilla.gnome.org/show_bug.cgi?id=769809
--disable-encoder=flac --disable-protocols --disable-devices \
--disable-network --disable-hwaccels --disable-dxva2 --disable-vdpau \
--disable-filters --enable-filter=yadif --disable-doc --disable-vda --disable-d3d11va --disable-dxva2 \
- --disable-audiotoolbox --disable-videotoolbox --disable-vaapi \
+ --disable-audiotoolbox --disable-videotoolbox --disable-vaapi --disable-crystalhd \
--disable-mediacodec --disable-nvenc --disable-mmal --disable-omx \
--disable-omx-rpi --disable-cuda --disable-cuvid --disable-libmfx \
--disable-libnpp --disable-iconv --disable-jni --enable-optimizations"