Provide LightMediaScanner 0.5.1, Rygel LMS plugin

LightMediaScanner (https://github.com/profusion/
lightmediascanner) is a media indexation daemon, and a hard
dependency for GENIVI Media Manager *.

The Rygel media server, already present, uses a dedicated
plugin to collect media lists from LMS via D-Bus.

We are here :
- backporting a recipe recently submitted to the official
"meta-openembedded" layer :
http://lists.openembedded.org/pipermail/openembedded-devel/
2015-October/104022.html
- rebasing Tizen IVI patches, which have recently been
rebased on top of official Rygel code, on top of our own :
https://bugzilla.gnome.org/show_bug.cgi?id=757120

We can then pull Rygel LMS plugin and LightMediaScanner,
enabling only plugins associated with royalty-free formats.

* : https://github.com/konsulko/tizen-distro/blob/master/
meta-tizen/meta-open-ivi/recipes-apps/media-manager/
media-manager.bb

Change-Id: I42b375eb5c560daa1f8ea4052a782cdaac0cc1d6
Signed-off-by: Manuel Bachmann <mbc@iot.bzh>