Stage --harmony_sloppy_function

Stage --harmony_sloppy_function

This patch turns on ES2015-style function hoisting semantics in
staging. --harmony_sloppy_function was previously staged, leading
to a number of bugs being filed and the staging being reversed;
important bugs have been fixed, so it is time to try again.

R=adamk
LOG=Y
BUG=v8:4285
Committed: https://crrev.com/333e27fd99f8187c97e62b9538529900f0a30668
Cr-Commit-Position: refs/heads/master@{#31190}

[Dan Ehrenberg, 2015-10-08 21:29:24]

The CQ bit was checked by littledan@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-10-08 21:29:31]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1393423002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1393423002/1

[Dan Ehrenberg, 2015-10-08 21:57:55]

The CQ bit was checked by littledan@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-10-08 21:58:12]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1393423002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1393423002/20001

[commit-bot: I haz the power, 2015-10-08 22:26:10]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-10-08 22:26:10]

Dry run: This issue passed the CQ dry run.

[adamk, 2015-10-09 02:26:24]

The CQ bit was checked by adamk@chromium.org

[adamk, 2015-10-09 02:26:25]

lgtm

[commit-bot: I haz the power, 2015-10-09 02:26:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1393423002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1393423002/20001

[commit-bot: I haz the power, 2015-10-09 02:27:33]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-10-09 02:27:57]

Patchset 2 (id:??) landed as
https://crrev.com/333e27fd99f8187c97e62b9538529900f0a30668
Cr-Commit-Position: refs/heads/master@{#31190}

[Dan Ehrenberg, 2015-10-12 11:06:49]

A revert of this CL (patchset #2 id:20001) has been created in
https://codereview.chromium.org/1402763003/ by littledan@chromium.org.

The reason for reverting is: This still breaks Inbox..