owntone: update to 28.2

Since version 28.0 forked-daapd is called owntone. This updates to 28.2 and makes the name change.

Also:
- added new required dependency on libuuid
- remove --disable-spotify since Spotify is now supported without requiring proprietary libspotify
- removed configure flags that are enabled by default anyway (mpd, verification etc.)
- add --disable-install_xxx since that is done by OpenWrt's build

Signed-off-by: Espen Jürgensen <espenjurgensen+openwrt@gmail.com>