Added %_NewConsString intrinsic.

Added %_NewConsString intrinsic.

No compiler support for now (BTW: %_NewString, doesn't have that,
either), inline allocation will come later. Hopefully the last
intrisic to add for a StringAddStub POC...

Committed: https://crrev.com/0a7d4f496a554028de0ab5a963c3a004e693b4cb
Cr-Commit-Position: refs/heads/master@{#27508}

[Sven Panne, 2015-03-27 13:23:20]

svenpanne@chromium.org changed reviewers:
+ jarin@chromium.org

[Jarin, 2015-03-27 14:09:41]

lgtm

[Sven Panne, 2015-03-30 05:52:47]

The CQ bit was checked by svenpanne@chromium.org

[commit-bot: I haz the power, 2015-03-30 05:52:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1041723002/1

[commit-bot: I haz the power, 2015-03-30 06:28:43]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-30 06:29:01]

Patchset 1 (id:??) landed as
https://crrev.com/0a7d4f496a554028de0ab5a963c3a004e693b4cb
Cr-Commit-Position: refs/heads/master@{#27508}