Ring a bell when the make stops, hanging on human input.

*** 9.2-RELEASE/ports/Mk/bsd.port.mk	Thu Jan 23 16:10:55 2014
--- jhs/ports/Mk/bsd.port.mk	Thu Jan 23 16:20:11 2014
***************
*** 6121,6127 ****
  .endif
  	@TMPOPTIONSFILE=$$(mktemp -t portoptions); \
  	trap "${RM} -f $${TMPOPTIONSFILE}; exit 1" 1 2 3 5 10 13 15; \
! 	${SETENV} ${D4P_ENV} ${SH} ${PORTSDIR}/Tools/scripts/dialog4ports.sh $${TMPOPTIONSFILE} || { \
  		${RM} -f $${TMPOPTIONSFILE}; \
  		${ECHO_MSG} "===> Options unchanged"; \
  		exit 0; \
--- 6121,6127 ----
  .endif
  	@TMPOPTIONSFILE=$$(mktemp -t portoptions); \
  	trap "${RM} -f $${TMPOPTIONSFILE}; exit 1" 1 2 3 5 10 13 15; \
! 	${SH} -c /home/jhs/bin/.sh/bell; ${SETENV} ${D4P_ENV} ${SH} ${PORTSDIR}/Tools/scripts/dialog4ports.sh $${TMPOPTIONSFILE} || { \
  		${RM} -f $${TMPOPTIONSFILE}; \
  		${ECHO_MSG} "===> Options unchanged"; \
  		exit 0; \