audio/lmms: Fix plist

Remove missing libgigplayer.so file from plist
Add missing dependecy to audio/lame reported by testport
Do some cleanup to make linters happy.

PR: 263355
Reported by: Alastair Hogge <agh@riseup.net>

(cherry picked from commit 11b1ba4c7ae5ba77ace0a8dacb5140ecaa60bceb)