OpenZFS 7348 - cstyle can't handle ellipsis on continuation line

Authored by: Hans Rosenfeld <hans.rosenfeld@nexenta.com>
Reviewed by: Yuri Pankov <yuri.pankov@nexenta.com>
Reviewed by: Jason King <jason.brian.king@gmail.com>
Reviewed by: Igor Kozhukhov <ikozhukhov@gmail.com>
Reviewed by: Robert Mustacchi <rm@joyent.com>
Approved by: Dan McDonald <danmcd@omniti.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Ported-by: Giuseppe Di Natale <dinatale2@llnl.gov>

OpenZFS-issue: https://www.illumos.org/issues/7348
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/c667d21
Closes #5655