multimedia/kodi-addon-inputstream.adaptive: Convert to USES=kodi and update to 2.6.6

• Update to 2.6.6
• Convert to USES=kodi
• Take maintainership
• repocopy from multimedia/kodi-addon-inputstream.adaptive-devel
• Intentionally not documented in MOVED because source port is EXPIRED already and

will soon be removed. Upgrade path is maintained via multimedia/kodi-devel -> kodi.
Good riddance.