search in the new location for knsrc files
Summary:
search in the new knsrc location, still fallback to the old one for
compatibility
Test Plan: tested with files in both locations
Reviewers: Plasma, leinir
Reviewed By: leinir
Subscribers: leinir, kde-frameworks-devel
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D21183
(cherry picked from commit e0df1f28231c54d0f92213b2a62428df578e581a)