package/kodi-{screensaver,visualisation}-*: fix comments
Various small changes to comments:
- shorten OpenGL info (Thomas)
- fix typos
- add full packages names when missing (Thomas)
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>