[Development] qtbase 5.12 is unlocked

[Liang Qi]

> On 21 Nov 2018, at 12:33, Liang Qi <Liang.Qi at qt.io> wrote:
> 
> Anyway, if it is in chaos mode again, someone need to lock it again. Hope this situation is understandable.
> 
> Happy hack!
> 
qtbase 5.12 got locked again, because https://bugreports.qt.io/browse/QTBUG-71953 and please wait a bit for https://codereview.qt-project.org/#/c/246251/ integrated…

Not because chaos this time…

—Liang