PPC: [compiler] No need to push literal index in VisitArrayLiteral.

PPC: [compiler] No need to push literal index in VisitArrayLiteral.

Port 9846f386f08e2aaf897851f0f54c0967c51484fb

Original commit message:
    The literal index is being pushed onto the stack while evaluating
    the non-constant subexpressions, but never used in fullcodegen (and
    hence not used in the optimizing compilers).

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

Committed: https://crrev.com/443fb4de8ebc375482a8277995782ec63ae26528
Cr-Commit-Position: refs/heads/master@{#32229}

[MTBrandyberry, 2015-11-24 20:00:12]

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

[commit-bot: I haz the power, 2015-11-24 20:00:18]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1468273005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1468273005/1

[commit-bot: I haz the power, 2015-11-24 20:48:53]

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

[commit-bot: I haz the power, 2015-11-24 20:48:54]

Dry run: This issue passed the CQ dry run.

[michael_dawson, 2015-11-24 21:14:43]

On 2015/11/24 20:48:54, commit-bot: I haz the power wrote:
> Dry run: This issue passed the CQ dry run.

lgtm

[MTBrandyberry, 2015-11-24 21:24:54]

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

[commit-bot: I haz the power, 2015-11-24 21:25:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1468273005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1468273005/1

[commit-bot: I haz the power, 2015-11-24 21:26:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-24 21:26:59]

Patchset 1 (id:??) landed as
https://crrev.com/443fb4de8ebc375482a8277995782ec63ae26528
Cr-Commit-Position: refs/heads/master@{#32229}