Added XDG compatibility to ivi-shell

Added XDG compatibility to ivi-shell

Backported M.Teyfel patch from wayland-devel mailing list:
https://lists.freedesktop.org/archives/wayland-devel/2017-November/035700.html

Upgrade wayland-ivi-extension to v2.0.2 but keep
using 1.1x for now with PREFERRED_VERSION until HMI could use the new
version.

Added Emre Ucan simple-id-agent to review.

Bug-AGL: SPEC-1096

Change-Id: I74c4ae0bf0bf822e27dcbb193dc9f7a13d3e270d
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/11991
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Nobuhiko Tanibata <nobuhiko_tanibata@denso.co.jp>
Reviewed-by: Tadao Tanikawa <tanikawa.tadao@jp.panasonic.com>
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>