spotify: Fix missing icon in KDE task manager

Spotify onlys get a generic "X11" icon in the task manager. No window title is
shown either.

Previously, the template moved the icons. Symlink /usr/share/spotify/icons
to /usr/libexec/spotify/icons so spotify finds the icons again.

This makes the spotify icon appear in the KDE taskbar. It also sets the
title of the spotify window.

Fixes: #36615

srcpkgs/spotify/template

@@ -1,7 +1,7 @@
 # Template file for 'spotify'
 pkgname=spotify
 version=1.1.84
-revision=3
+revision=4
 archs="x86_64"
 create_wrksrc=yes
 hostmakedepends="curl w3m libcurl"
@@ -36,8 +36,7 @@ do_install() {
 	vmkdir usr/libexec/
 	vcopy usr/share/spotify usr/libexec/
 
-	# move icons to /usr/share
-	mv "${DESTDIR}/usr/libexec/spotify/icons" "${DESTDIR}/usr/share/spotify/"
+	ln -s "../../libexec/spotify/icons" "${DESTDIR}/usr/share/spotify/"
 
 	# install icons
 	for _s in 16 22 24 32 48 64 128 256 512; do