ALSA + FFMPEG compatibility issue

[ssfrr]

Users have been reporting some issues with installing PortAudio.jl, which I think are related to an update to FFMPEG that isn't reflected in the ALSA build.

alsa_plugins_jll loads libasound_module_pcm_a52.so, and that that library seems to be dependent on libavcodec.so.58, which it's not finding.

It looks like the latest version of FFMPEG_jll builds libavcodec.so.60, so maybe alsa_plugins_jll needs to be updated to match.

I'm pretty out of touch with how the binary build system works these days, is it just a matter of kicking off a new build for alsa_plugins_jll?

[giordano]

I'm pretty out of touch with how the binary build system works these days, is it just a matter of kicking off a new build for alsa_plugins_jll?

Not just that, but the recipe must also specify appropriate compat bounds for the dependencies, otherwise you'll have the same problem later.

[tp2750]

I'll like to help fix this.
Merge request #8863 makes alsa_plugin build again by setting a compat to the last version of FFMPEG that provides libasound_module_pcm_a52.so.

I also needed to restrict the architectures. It looks like it only works for the architectures supported by julia 1.0.

This might not be the cleanest solution, but it was what I could figure out.