[dev-libs/extra-cmake-tools] Add kde-independent ebuilds

This add ebuilds for extra-cmake-modules which are needed by some packages for Qt5 compilation.

As there are no real releases, just version number increments, I made a 0.0.8 ebuild with the last commit before the version bump. Sadly current head requires (unreleased) Qt 5.2.0 so that for building packages for Qt 5.1 we need 0.0.8.