PPC: [es6] Make new.target work in functions

PPC: [es6] Make new.target work in functions

Port 7a63bf77eb7610afdc1a968f7660781e5160ba8d

Original commit message:
This makes new.target work in [[Call]] and [[Construct]] of ordinary
functions.

We achieve this by introducing a new construct stub for functions that
uses the new.target variable. The construct stub pushes the original
constructor just above the receiver in the construct frame.

R=arv@chromium.org, dstence@us.ibm.com, michael_dawson@ca.ibm.com
BUG=

Committed: https://crrev.com/57c5fd7ec5e9c26fc4568e7e16363ec75faa9ec2
Cr-Commit-Position: refs/heads/master@{#29360}

[dstence, 2015-06-29 20:58:16]

lgtm

[arv (Not doing code reviews), 2015-06-29 20:58:25]

LGTM

[MTBrandyberry, 2015-06-29 20:58:59]

The CQ bit was checked by mbrandy@us.ibm.com

[commit-bot: I haz the power, 2015-06-29 20:59:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1213303002/1

[commit-bot: I haz the power, 2015-06-29 21:31:14]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-29 21:31:34]

Patchset 1 (id:??) landed as
https://crrev.com/57c5fd7ec5e9c26fc4568e7e16363ec75faa9ec2
Cr-Commit-Position: refs/heads/master@{#29360}