extra-cmake-modules installs into versionned dir

[David Faure]

Same problem as what we fixed in kdepimlibs long ago...

extra-cmake-modules installed itself into 
  share/extra-cmake-modules-0.0.2
and after updating it now installs itself into
  share/extra-cmake-modules-0.0.3

which means that 1) the cmakecache.txt in kdelibs pointing to 0.0.2 creates 
much trouble, one has to clean up the cache to be able to compile kdelibs 
again,
and 2) as long as kdelibs's toplevel CMakeLists.txt said "0.0.2", it would 
pick up the 0.0.2 subdir, even after cleaning up the cache!

Can we PLEASE get rid of the version number in the install directory?
It's way more trouble than any benefit it might bring.

If one day we want co-installable incompatible releases, *then* let's put a 
version number in there... I guess that means major version number only,
but we can start that once it'll be 1 :) 0 would look weird.

-- 
David Faure, faure at kde.org, http://www.davidfaure.fr
Sponsored by Nokia to work on KDE, incl. KDE Frameworks 5