Fixes NetworkInterface.list crash on Android

Fixes NetworkInterface.list crash on Android

Previously, Socket::ListInterfaces failed to set the os_error out
parameter causing a crash in the caller. This change sets an error here.

I've also added NetworkInterface.listSupported, which returns false on
Android, and true everywhere else. ifaddrs.h continues not to exist in
the NDK, so in order to support NetworkInterface.list, we'd have to
reimplement it, or find a suitable reimplementation somewhere.

related #26329

R=johnmccutchan@google.com

Committed: https://github.com/dart-lang/sdk/commit/ba550f1c436724c0eabd3f48084d035e18ec50aa

[zra, 2016-04-25 21:43:30]

zra@google.com changed reviewers:
+ iposva@google.com, johnmccutchan@google.com

[Cutch, 2016-04-25 21:50:08]

LGTM!

[zra, 2016-04-26 14:49:02]

Description was changed from

==========
Fixes NetworkInterface.list crash on Android

Previously, Socket::ListInterfaces failed to set the os_error out
parameter causing a crash in the caller. This change sets an error here.

I've also added NetworkInterface.listSupported, which returns false on
Android, and true everywhere else. ifaddrs.h continues not to exist in
the NDK, so in order to support NetworkInterface.list, we'd have to
reimplement it, or find a suitable reimplementation somewhere.

related #26329
==========

to

==========
Fixes NetworkInterface.list crash on Android

Previously, Socket::ListInterfaces failed to set the os_error out
parameter causing a crash in the caller. This change sets an error here.

I've also added NetworkInterface.listSupported, which returns false on
Android, and true everywhere else. ifaddrs.h continues not to exist in
the NDK, so in order to support NetworkInterface.list, we'd have to
reimplement it, or find a suitable reimplementation somewhere.

related #26329

R=johnmccutchan@google.com

Committed:
https://github.com/dart-lang/sdk/commit/ba550f1c436724c0eabd3f48084d035e18ec50aa
==========

[zra, 2016-04-26 14:49:03]

Committed patchset #1 (id:1) manually as
ba550f1c436724c0eabd3f48084d035e18ec50aa (presubmit successful).