monit: fix configuration error

Configuration fails for the monit package, with the following error.

  checking for SSL library directory... Not found

  Couldn't find your SSL library files.
  Use --with-ssl-lib-dir option to fix this problem or disable the
  SSL support with --without-ssl

Tweak the monit configuration command line so that openssl is found.

Signed-off-by: Simon Dawson <spdawson@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>