Add network interface flag constants for all platforms

[LuoZijun]

Add network interface flag constants for all platforms.

old PR: #839

[alexcrichton]

Thanks! Loks like there's some CI errors though?

[LuoZijun]

@alexcrichton this error from libc/ci/style.rs , the master branch can not be pass too, not only my patch-1 branch.

[faern]

@LuoZijun What if you remove all the formatting and make the PR contain only the new constants? Try that. Even if it does not make the tests pass more it at least makes the PR focused more on the feature, and not on formatting.

EDIT: As you can see the master branch does build: https://travis-ci.org/rust-lang/libc/builds/298203207
Might be that you have a different version/setup of some software that makes it fail when you build locally?

[LuoZijun]

@faern

i'm sry, i found that problem is my sublime setting ( "format_on_save": true ).

[alexcrichton]

@bors: r+

[bors]

📌 Commit 165bbc3 has been approved by alexcrichton

[bors]

⌛ Testing commit 165bbc3 with merge ecc3e01...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: alexcrichton
Pushing ecc3e01 to master...