Exit on any message in spawn_link_safe.
Exit on any message in spawn_link_safe.

This is probably wrong right now, but we can improve the API later.

Change-Id: I47da78c5c864aa6ce3c0daaecc315d9f6f7a867c
Reviewed-on: http://review.northscale.com:8080/618
Reviewed-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>
Tested-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>

daverigby/ns_server,vzasade/ns_server,mschoch/ns_server,ceejatec/ns_server,daverigby/ns_server,pavel-blagodov/ns_server,membase/ns_server,ingenthr/ns_server,t3rm1n4l/ns_server,membase/ns_server,vzasade/ns_server,ceejatec/ns_server,daverigby/ns_server,daverigby/ns_server,ceejatec/ns_server,ceejatec/ns_server,mschoch/ns_server,nimishzynga/ns_server,membase/ns_server,ceejatec/ns_server,membase/ns_server,ingenthr/ns_server,nimishzynga/ns_server,t3rm1n4l/ns_server,nimishzynga/ns_server,membase/ns_server,membase/ns_server,t3rm1n4l/ns_server,nimishzynga/ns_server,nimishzynga/ns_server,ingenthr/ns_server,ceejatec/ns_server,pavel-blagodov/ns_server,pavel-blagodov/ns_server,mschoch/ns_server,t3rm1n4l/ns_server,mschoch/ns_server,nimishzynga/ns_server,t3rm1n4l/ns_server,vzasade/ns_server,mschoch/ns_server,pavel-blagodov/ns_server,ingenthr/ns_server,mschoch/ns_server,daverigby/ns_server,vzasade/ns_server