Also install afszcm.cat for i386_fbsd

Also install afszcm.cat for i386_fbsd

The change gerrit/4760 enabled the use of gencat to actually build
this file, but failed to also change installation logic, so it was
sitting unused in the build tree.  Fix this, and install the file.
This allows us to remove a shell case statement which had formerly
been needed to enforce this restriction.

Reviewed-on: http://gerrit.openafs.org/4815
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>
(cherry picked from commit 445a8b5461c66160552136214a1d8d97de15967e)

Change-Id: Ic39fecb824be58a8890c665dedcd1eff2b4f9bdc
Reviewed-on: http://gerrit.openafs.org/4848
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>