package/libmediaart: bump to version 1.9.5

- Switch to meson-package
- Drop BR2_PACKAGE_LIBMEDIAART_BACKEND_NONE which is not supported
  anymore
- Update indentation in hash file (two spaces)

https://gitlab.gnome.org/GNOME/libmediaart/-/blob/1.9.5/NEWS



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