devel/qt5-core: please merge the fix for QTBUG-87010

[Alexey Dokuchaev]

Hi there,

There was a regression in Qt 5.15 which had broken e.g. astro/stellarium:
https://github.com/Stellarium/stellarium/issues/1131 (with a PoC patch).

It was filed upstream as https://bugreports.qt.io/browse/QTBUG-87010 and
finally fixed.

Can you please merge the patch to the `devel/qt5-core' so we can unbreak
`astro/stellarium' again?  Thanks,

./danfe