Revert of Remove SIMD.js from V8.

Revert of Remove SIMD.js from V8. (patchset #7 id:120001 of https://codereview.chromium.org/2684313003/ )

Reason for revert:
Breaks Node integration build.

Original issue's description:
> Remove SIMD.js from V8.
> 
> LOG=Y
> BUG=v8:4124, v8:5948
> R=bradnelson@chromium.org,bmeurer@chromium.org,jochen@chromium.org,hpayer@chromium.org,danno@chromium.org
> 
> Review-Url: https://codereview.chromium.org/2684313003
> Cr-Original-Commit-Position: refs/heads/master@{#43162}
> Committed: https://chromium.googlesource.com/v8/v8/+/d170c57ab996d00c4665a9d865bd5754a1806c6c
> Review-Url: https://codereview.chromium.org/2684313003
> Cr-Commit-Position: refs/heads/master@{#43169}
> Committed: https://chromium.googlesource.com/v8/v8/+/a9b59a11f1bfe069afabe5567f919727456f1f12

TBR=bradnelson@chromium.org,bmeurer@chromium.org,jochen@chromium.org,hpayer@chromium.org,danno@chromium.org,bradnelson@google.com,machenbach@chromium.org,bbudge@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4124, v8:5948
Review-Url: https://codereview.chromium.org/2695653005
Cr-Commit-Position: refs/heads/master@{#43170}
Committed: https://chromium.googlesource.com/v8/v8/+/a386eb4f04b258a9e76cd0249146b4c856ee1cd6

[Franzi, 2017-02-13 21:33:08]

The CQ bit was checked by franzih@chromium.org

[Franzi, 2017-02-13 21:33:09]

Created Revert of Remove SIMD.js from V8.

[commit-bot: I haz the power, 2017-02-13 21:33:13]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-13 21:33:48]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1487021588289900, "parent_rev":
"a9b59a11f1bfe069afabe5567f919727456f1f12", "commit_rev":
"a386eb4f04b258a9e76cd0249146b4c856ee1cd6"}

[commit-bot: I haz the power, 2017-02-13 21:33:55]

Description was changed from

==========
Revert of Remove SIMD.js from V8. (patchset #7 id:120001 of
https://codereview.chromium.org/2684313003/ )

Reason for revert:
Breaks Node integration build.

Original issue's description:
> Remove SIMD.js from V8.
> 
> LOG=Y
> BUG=v8:4124,v8:5948
>
R=bradnelson@chromium.org,bmeurer@chromium.org,jochen@chromium.org,hpayer@chr...
> 
> Review-Url: https://codereview.chromium.org/2684313003
> Cr-Original-Commit-Position: refs/heads/master@{#43162}
> Committed:
https://chromium.googlesource.com/v8/v8/+/d170c57ab996d00c4665a9d865bd5754a18...
> Review-Url: https://codereview.chromium.org/2684313003
> Cr-Commit-Position: refs/heads/master@{#43169}
> Committed:
https://chromium.googlesource.com/v8/v8/+/a9b59a11f1bfe069afabe5567f919727456...

TBR=bradnelson@chromium.org,bmeurer@chromium.org,jochen@chromium.org,hpayer@c...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4124,v8:5948
==========

to

==========
Revert of Remove SIMD.js from V8. (patchset #7 id:120001 of
https://codereview.chromium.org/2684313003/ )

Reason for revert:
Breaks Node integration build.

Original issue's description:
> Remove SIMD.js from V8.
> 
> LOG=Y
> BUG=v8:4124,v8:5948
>
R=bradnelson@chromium.org,bmeurer@chromium.org,jochen@chromium.org,hpayer@chr...
> 
> Review-Url: https://codereview.chromium.org/2684313003
> Cr-Original-Commit-Position: refs/heads/master@{#43162}
> Committed:
https://chromium.googlesource.com/v8/v8/+/d170c57ab996d00c4665a9d865bd5754a18...
> Review-Url: https://codereview.chromium.org/2684313003
> Cr-Commit-Position: refs/heads/master@{#43169}
> Committed:
https://chromium.googlesource.com/v8/v8/+/a9b59a11f1bfe069afabe5567f919727456...

TBR=bradnelson@chromium.org,bmeurer@chromium.org,jochen@chromium.org,hpayer@c...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4124,v8:5948

Review-Url: https://codereview.chromium.org/2695653005
Cr-Commit-Position: refs/heads/master@{#43170}
Committed:
https://chromium.googlesource.com/v8/v8/+/a386eb4f04b258a9e76cd0249146b4c856e...
==========

[commit-bot: I haz the power, 2017-02-13 21:33:58]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/a386eb4f04b258a9e76cd0249146b4c856e...