Log Message:
A couple of fixes to sbcl:
 * Don't request job control in the shell scripts used during the build
   via the "-m" option; it will cause a backgrounded job to stall with
   SIGTTIN.
 * Add a Config.generic-netbsd, and collect common settings for all
   the various NetBSD configs there.
 * Do tty handling in sbcl the same way OpenBSD does, i.e. no TIOCNOTTY.
Bump PKGREVISION.