Add pulseaudio to the LD_LIBARY_PATH of the platform snap

[tjyrinki]

Qt Multimedia is failing due to not finding the library.

[didrocks]

see my comment on #24 and attached bug. I'm really not a fan and it seems Qt is doing something not right (or it should look for itself relative to each defined LD_LIBRARY_PATH), making sense?

[tjyrinki]

Ok. Renato could fill in with the details of what he sees when trying to run such an app. I'm wondering if it's not Qt itself but Pulseaudio that tries to find its private library from the usual location but cannot.

[didrocks]

That's more than possible that it's using RPATH or things like that. I'm not opposed to add it for those reasons, but will like that you dig into why it's needed actually

[tpeeters]

I ran into this also and reported issue #37 (before I saw this PR).

[didrocks]

Ok, now that we have a real use case, I'm happy to readd this path thus. It needs to be more generic than this PR to cope for GNOME, Snap only and app-platform runtime. If you don't have time to tackle this this week, I'll have a shot at it later on.

[didrocks]

Ok, no new one that one, pushed a fix to the common file thus. We can close this one.
Thanks everyone

[tjyrinki]

Thank you!