Rename option PORT_FFI --> LIBFFI.

Suggested by:	koobs


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@372134 35697150-7ecd-e111-bb59-0022644237b5
Remove deprecated KDE4=kdehier


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@372135 35697150-7ecd-e111-bb59-0022644237b5