[TESTING] Kodi 18 (Leia) builds for Vero 2 & 4K

17.8-077, 2 June 2017: Based off OSMC commit (0948dc5f) and xbmc (2c9f1a18a)

XBMC:
[dependencies][windows] bump libmicrohttpd to 0.9.55 (PR:12205, 1 commit, 2 files changed)
[addons] add first step of gui on addon interface (PR:12202, 1 commit, 39 files changed)

Includes latest addons: inputstream.adaptive (f1f5539d), inputstream.rtmp (d93d32d4), peripheral.joystick (d6cbf198), pvr.argustv (b281e04f), pvr.demo (ffee02b8), pvr.dvblink (6d42eae1), pvr.dvbviewer (3f05af60), pvr.filmon (300c595e), pvr.hdhomerun (9073b99b), pvr.hts (7f998e0f), pvr.iptvsimple (dbf6011e), pvr.mediaportal.tvserver (07d73f3a), pvr.mythtv (f2da22ca), pvr.nextpvr (239dbef3), pvr.njoy (4785afd2), pvr.octonet (9bbd7cf3, +9), pvr.pctv (f61e2541), pvr.stalker (151e3d3f), pvr.vbox (df9efea4), pvr.vdr.vnsi (40dc17d0), pvr.vuplus (83a729ea), pvr.wmc (93cebfc7), vfs.rar (4ce78b0f)