std: Add into_raw_os traits to the OS preludes

[alexcrichton]

These traits were mistakenly left out of the OS-specific prelude modules when
they were added.

[rust-highfive]

r? @brson

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[brson]

I'm not clear on when we are allowed to upgrade the various preludes. The main prelude does not get updated. When is it ok to update the I/O and OS preludes?

[sfackler]

I believe we're okay with updating all non-default preludes because people have to opt-in to glob importing out of them.

[alexcrichton]

Yes strictly speaking this is a breaking change because you could have your own IntoRaw* trait defined locally and this will cause conflicts. In practice, however, I suspect this breaks no code.

[brson]

@bors r+

[bors]

📌 Commit 708200c has been approved by brson

[bors]

⌛ Testing commit 708200c with merge 5fadab6...

[bors]

💔 Test failed - auto-linux-32-nopt-t

[alexcrichton]

@bors: retry

On Sat, Aug 22, 2015 at 7:29 AM bors [email protected] wrote:

[image: 💔] Test failed - auto-linux-32-nopt-t
http://buildbot.rust-lang.org/builders/auto-linux-32-nopt-t/builds/6162

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#27896 (comment).

[bors]

⌛ Testing commit 708200c with merge 8278342...

[bors]

☀️ Test successful - auto-linux-32-nopt-t, auto-linux-32-opt, auto-linux-64-nopt-t, auto-linux-64-opt, auto-linux-64-x-android-t, auto-mac-32-opt, auto-mac-64-nopt-t, auto-mac-64-opt, auto-win-gnu-32-nopt-t, auto-win-gnu-32-opt, auto-win-gnu-64-nopt-t, auto-win-gnu-64-opt, auto-win-msvc-32-opt, auto-win-msvc-64-opt