Qt fix for Krita deadlock-on-start

[Thiago Macieira]

Ref: https://bugreports.qt.io/browse/QTBUG-83207
Patch: 276fa8383a7535765be7182883ef4aade17ce013
https://code.qt.io/cgit/qt/qtbase.git/commit/?
h=5.14&id=276fa8383a7535765be7182883ef4aade17ce013

This patch fixes a regression in Qt 5.14.2 that caused Krita (and possibly 
other KOffice/Calligra applications) to deadlock on start. You'll probably 
want to backport it.
-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
   Software Architect - Intel System Software Products