WinRT: Remove support for Windows Phone 8.0

Change-Id: I0e738ff7c8e9ef53d4a9a4c1a2105b1a4e974255
Reviewed-by: Andrew Knight <andrew.knight@theqtcompany.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>
WinRT: Create mapping file for deployment when build is finished

Task-number: QTCREATORBUG-13275
Change-Id: I1fb8b951468793bd6edc0e10e53d708a876c0bf3
Reviewed-by: Andrew Knight <andrew.knight@theqtcompany.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>
WinRT: be more verbose about deployment issues

Change-Id: I5a507b2f541e779cd6bcb7ec4f8378013bef82f2
Reviewed-by: Andrew Knight <andrew.knight@theqtcompany.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>