Enable audio on qemu
Added a patch to alsa-lib to support ALSA_PLUGIN_DIRS environment variable. It will be used by pmbootstrap qemu to specify the plugin directory inside the chroot.
Enabled the hda sound driver in linux-postmarketos-stable, hope nothings break in other devices...
Related pmbootstrap!1840 (merged)
Closes pmbootstrap#1808 (closed)
Edited by Daniele Debernardi