Added a set of Game Folder icons
Summary: Add icons for folders used for games
Test Plan:
Reviewers: VDG, ngraham, andreyorst
Reviewed By: VDG, ngraham
Subscribers: aaronhoneycutt, bruns, ngraham, kde-frameworks-devel, ndavis
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D8912