Reland: X87: disable the regress-undefined-nan test case for x87.

Reland: X87: disable the regress-undefined-nan test case for x87.

      The reason is when native_context_specialization flag is ture, X87 turbofan
      will hit the known issue that X87 will change a sNaN to qNaN by default. And
      then it will fail when bit-comparing the source (sNaN) and the result (qNaN).

   reland https://codereview.chromium.org/1414733004/.

BUG=

Committed: https://crrev.com/a02d0e96b8587b4c0103914652da5f4b8ce3c2f9
Cr-Commit-Position: refs/heads/master@{#31552}

[chunyang.dai, 2015-10-26 06:38:51]

Description was changed from

==========
Reland: X87: disable the regress-undefined-nan test case for x87.

      The reason is when native_context_specialization flag is ture, X87
turbofan
      will hit the known issue that X87 will change a sNaN to qNaN by default.
And
      then it will fail when bit-comparing the source (sNaN) and the result
(qNaN).

BUG=
==========

to

==========
Reland: X87: disable the regress-undefined-nan test case for x87.

      The reason is when native_context_specialization flag is ture, X87
turbofan
      will hit the known issue that X87 will change a sNaN to qNaN by default.
And
      then it will fail when bit-comparing the source (sNaN) and the result
(qNaN).

   reland https://codereview.chromium.org/1414733004/.

BUG=
==========

[chunyang.dai, 2015-10-26 06:38:51]

chunyang.dai@intel.com changed reviewers:
+ bmeurer@chromium.org, weiliang.lin@intel.com

[chunyang.dai, 2015-10-26 06:39:36]

PTAL.

Thanks

[Benedikt Meurer, 2015-10-26 09:25:24]

lgtm

[chunyang.dai, 2015-10-26 09:26:17]

The CQ bit was checked by chunyang.dai@intel.com

[commit-bot: I haz the power, 2015-10-26 09:26:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1419573007/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1419573007/1

[commit-bot: I haz the power, 2015-10-26 10:27:34]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-26 10:27:56]

Patchset 1 (id:??) landed as
https://crrev.com/a02d0e96b8587b4c0103914652da5f4b8ce3c2f9
Cr-Commit-Position: refs/heads/master@{#31552}