Compile package structure plugins into expected subdirectory
Summary: This means they're found by unit tests pre-installation
Test Plan:
Removed installed files
Ran make (but not make install)
ConfigModelTest now passes
Reviewers: Plasma, apol
Reviewed By: apol
Subscribers: kde-frameworks-devel
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D22682