Android: Fix listing of aliases in keystore

Task-number: QTCREATORBUG-11339
Change-Id: Id571813ae6c057b76a384c21a2330be908b3ba6e
Reviewed-by: BogDan Vatra <bogdan@kde.org>
QmakeProject: remove duplicates in ::files()

Task-number: QTCREATORBUG-11292
Change-Id: I48a535303d916cdae22ea2a0cb62ef347b4ccf88
Reviewed-by: Daniel Teske <daniel.teske@digia.com>