package/gupnp-dlna: bump to version 0.12.0

- GStreamer 0.10 back-end has been dropped with
  https://gitlab.gnome.org/GNOME/gupnp-dlna/-/commit/af50a8ac988c3929cec1afc6f85458d98ce80485
- Switch to meson-package (to avoid autoreconf as no configure is
  shipped anymore)
- Update indention in hash file (two spaces)

https://gitlab.gnome.org/GNOME/gupnp-dlna/-/blob/gupnp-dlna-0.12.0/NEWS



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>