bug#15777: 24.3.50; cl symbols are no more fontlocked

[Drew Adams]

The font-locking of cl stuff belongs, whenever that stuff
is still used - for whatever reason it might be used.

If you want to move this old cl-specific font-locking to
the "deprecated" cl code files, so that it is not mixed
in with the general font-locking code, that would be OK.

(Haven't checked - maybe this is already the case, in
which case the regression is even more easily reversed.)

The point is that code that needs it still needs it,
whether or not that code is still being promoted or
recommended.