Add xdg-shell protocol file version 1.4.0
Add xdg-shell protocol file version 1.4.0

Source: http://cgit.freedesktop.org/wayland/weston/plain/protocol/xdg-shell.xml?id=1.4.0

This file will need to be refreshed on protocol update
until xdg-shell land in wayland's public headers

Task-number: QTBUG-38633/part/1of2
Change-Id: I397d863dcfc2223ac6eb234c37dbcd7449eced58
Reviewed-by: Giulio Camuffo <45605e874bf615bb32ecc5147ce58a7b3b905776@jollamobile.com>

Tofee/qtwayland,Tofee/qtwayland,Tofee/qtwayland