Download patch
ref: 6f30420136d8f2a87790dbe826bc6800de74770a parent: e93a85710edab0e55ba792955da235083c8a0150 author: aiju <devnull@localhost> date: Tue Dec 11 02:44:34 EST 2018
add dtracy support to mkdevc and enable dtracy with plan9.ini