Do not detect kde4 directory but assume it is the same location, this means people who install as non-root with kde-srcbuild can install it
Summary: Do not detect global kde4 directory
Test Plan: run make install
Reviewers: sebas, Plasma, dfaure
Reviewed By: dfaure
Subscribers: plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D2258