alsaLib: add upstream pcm interval patch

fixes audio for Audacious, Old School Runescape (yet to be packaged),
and a few other packages, see the following issues

https://bugs.archlinux.org/task/60591?project=1&string=alsa-lib

https://bugzilla.redhat.com/show_bug.cgi?id=1640602

http://git.alsa-project.org/?p=alsa-lib.git;a=commitdiff;h=b420056604f06117c967b65d43d01536c5ffcbc9