AndroidPackageCreationStep: Ensure right thread for handleOutput()

The ::run method is run in a separate thread, yet the owner of the
buildstep is the gui thread. As such we need to use a DirectConnection
to ensure that the slot is called in the right thread.

Task-number: QTCREATORBUG-9660
Change-Id: Ia206f3256a23f70f50d31c739359ff24b952fe46
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
Checkout correct branch of the binary-artifacts repository.

Change-Id: I66e27b54b59874f5f69958cf9e178a5ce1b2da97
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Merge remote-tracking branch 'origin/2.7' into 2.8

Conflicts:
	qtcreator.pri

Change-Id: I6726277830ddbd3b21391b5c5e48880929a2d725