It was a regression from the "Move icons to Utils" commit which
broke qbs builds.
QTCREATORLOGO_BIG aka QtProject-qtcreator.png is only used in
coreplugin and have some not moved install logic inside
coreplugin.pro

Change-Id: I8258b845108f8801581d7ee8d6771808b306a602
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>