NEX-19401 update copyright year to 2019
Reviewed by: Rick McNeal <rick.mcneal@nexenta.com>
Reviewed by: Joyce McIntosh <joyce.mcintosh@nexenta.com>

*** 8,18 ****
   * source.  A copy of the CDDL is also available via the Internet at
   * http://www.illumos.org/license/CDDL.
   */
  
  /*
!  * Copyright 2018 <contributor>
   */
  
          .file   "prototype.s"
  
  /*
--- 8,18 ----
   * source.  A copy of the CDDL is also available via the Internet at
   * http://www.illumos.org/license/CDDL.
   */
  
  /*
!  * Copyright 2019 Nexenta Systems, Inc.
   */
  
          .file   "prototype.s"
  
  /*