Properly use kpackage_install_package

Summary:
NO_DEPRECATED_WARNING passed as the fifth arg to
kpackage_install_package disables a deprecation warning. Passing
anything else does nothing.

Reviewers: #breeze, davidedmundson

Reviewed By: davidedmundson

Subscribers: mart, davidedmundson, plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D11909