Add `IFF_*` constants to linux, android and fuchsia#916

Merged

bors merged 1 commit intorust-lang:masterfrom LuoZijun:patch-1

Feb 7, 2018

+13-8

Commits on Feb 7, 2018

Add constants IFF_TUN, IFF_TAP and IFF_NO_PI on linux, android and fuchsia system
luozijun
committed