Update Japanese translations.
Update Japanese translations.

Merge-request: 2700
Reviewed-by: Oswald Buddenhagen <6a8868beda3e139b5ac22b2534a23d3e6ba81819@nokia.com>
(cherry picked from commit 241547b8fa39125316b3e7a6466f3b89a4ab2016)
Change-Id: I241547b8fa39125316b3e7a6466f3b89a4ab2016
Sanity-Review: Qt Sanity Bot <5581206bb7e0307f0d99eb71898ae6b694149ca5@ovi.com>

Distrotech/qttranslations,qtproject/qttranslations