android_webview: force libstdc++ use on host.

android_webview: force libstdc++ use on host.

The way we build host binaries in the android gyp backend currently
doesn't work if we attempt to link against libc++. To avoid problems for
AOSP work to change the default C++ library, explicitly specify that we
want to use libstdc++ (the current default).

BUG=
NOTRY=true

Committed: https://crrev.com/8beb670cff7f4c09fb6f48b122efea1dff3e8803
Cr-Commit-Position: refs/heads/master@{#302784}

[Torne, 2014-11-05 11:43:03]

torne@chromium.org changed reviewers:
+ benm@chromium.org

[benm (inactive), 2014-11-05 11:49:38]

lgtm

[Torne, 2014-11-05 12:15:07]

The CQ bit was checked by torne@chromium.org

[commit-bot: I haz the power, 2014-11-05 12:16:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/705753002/1

[commit-bot: I haz the power, 2014-11-05 12:16:48]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-05 12:17:29]

Patchset 1 (id:??) landed as
https://crrev.com/8beb670cff7f4c09fb6f48b122efea1dff3e8803
Cr-Commit-Position: refs/heads/master@{#302784}