To confirm the functionality of custom imageformats plugins in Qt
image reading, both for supporting new formats and for overriding Qt's
builtin formats.
Change-Id: I6abafdb47301ad1f35b19951e42b1f3b61fe6ec3
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
(cherry picked from commit 6eefe0ca59dc25f7953b93e8b80c62c78a6ccfde)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
Eirik Aavitsland