example/yajl/couchview.c: pass cookie to the command

Fixes coredump when executing ./examples/yajl/couchview

Change-Id: I883b304afa4b26e074923ce522184d236b44e036
Reviewed-on: http://review.couchbase.org/26093
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>