[Development] Maintainers, your action needed: Qt 5.9.7 changes files

[Jani Heikkinen]

Hi,

Initial ones here: https://codereview.qt-project.org/#/q/message:%22Add+changes+file+for+Qt+5.9.7%22,n,z

Please take over & finalize if needed. And get approval as soon as possible

br,
Jani Heikkinen
Release Manager