Provide a way to rotate images 90 degrees before passing them on to barcode decoder

Summary: We have api to handle rotated pdf417 barcodes

Test Plan: I can get data from some barcodes now.

Reviewers: vkrause

Reviewed By: vkrause

Subscribers: kde-pim

Tags: KDE PIM

Differential Revision: https://phabricator.kde.org/D13017