linux-c7-{tcl,tk}85: Fix package

tcl85 and tk85 were removed in 0e2a2491a3bf but these two ports referenced the
corresponding pkg-descr files.

Make a copy of the descriptions as it is done with tcl/tk 86 and 87

Fixes: 0e2a2491a3bf2f45f65667f75b7eb0d68bf321f8