Backporting Clang support to KDE 4.11 FindKDE4Internal.cmake

[Raphael Kubo da Costa]

Milian Wolff <mail at milianw.de> writes:

> Btw, is there still no BSD using clang by default to build KDE? How
> did they manage to get this to work without the patch?

FreeBSD's the first BSD to move towards having clang as the official
compiler in future releases. We've been patching FindKDE4Internal.cmake
locally for a while, and today I've finally had the time to upstream the
changes in <https://git.reviewboard.kde.org/r/112136> and
<https://git.reviewboard.kde.org/r/112137>.