PPC: Rename original constructor to new target

PPC: Rename original constructor to new target

Port 07c1d181e7d8ec838ea5f97e0514ce2a426b1f88

R=verwaest@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=

Committed: https://crrev.com/acf3baf44cb173969c43b1efc928e4d847dd9bc2
Cr-Commit-Position: refs/heads/master@{#32055}

[MTBrandyberry, 2015-11-17 17:49:07]

The CQ bit was checked by mbrandy@us.ibm.com to run a CQ dry run

[commit-bot: I haz the power, 2015-11-17 17:49:12]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1452213003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1452213003/1

[commit-bot: I haz the power, 2015-11-17 18:11:54]

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

[commit-bot: I haz the power, 2015-11-17 18:11:55]

Dry run: This issue passed the CQ dry run.

[JoranSiu, 2015-11-17 19:29:45]

On 2015/11/17 18:11:55, commit-bot: I haz the power wrote:
> Dry run: This issue passed the CQ dry run.

lgtm

[MTBrandyberry, 2015-11-17 19:38:22]

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

[commit-bot: I haz the power, 2015-11-17 19:38:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1452213003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1452213003/1

[commit-bot: I haz the power, 2015-11-17 19:39:46]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-17 19:40:06]

Patchset 1 (id:??) landed as
https://crrev.com/acf3baf44cb173969c43b1efc928e4d847dd9bc2
Cr-Commit-Position: refs/heads/master@{#32055}