qt5-git: Update to rc1+, latest revision in 5.4 branch

* qtwebengine LIC_FILES_CHKSUM updated because of Copyright
  year update in chromium's LICENSE
  < // Copyright (c) 2013 The Chromium Authors. All rights reserved.
  and shortened the entry for qtwebengine LIC_FILES_CHKSUM, because
  it was including also few #include lines which were changed recently

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>