9820 Want risc-v disassembler
Reviewed by: Dan McDonald <danmcd@joyent.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Approved by: Garrett D'Amore <garrett@damore.org>

7700 want dis test suite
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: Adam Leventhal <adam.leventhal@gmail.com>
Approved by: Richard Lowe <richlowe@richlowe.net>