qt5: bump version to 5.6.2

qt5: bump version to 5.6.2

- qt5base: remove obsolete '-no-nis' configure parameter ([1])
- qt5base: remove  upstream committed patch 0007-Remove-libudev-dependency-from-kms.pro.patch ([2])
- qt5imageformats: remove upstream committed  patch 0001-tvOS-support.patch ([3])

[1] https://code.qt.io/cgit/qt/qtbase.git/commit/?id=644d0e75240811212ed9fd0c21e3bd05db3ba5db
[2] https://code.qt.io/cgit/qt/qtbase.git/commit/?id=72492735b7b7770808fcc9fe067e8f03fab827fc
[3] https://git.buildroot.net/buildroot/commit/package/qt5?id=9a55b996651fdfbc40e202cb4dd725dce624ca91

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Tested-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>