Fix "[turbofan] Spill rsi and rdi in their existing locations."

Fix "[turbofan] Spill rsi and rdi in their existing locations."

Commit 20f3a0778299c0fd0c6e7ce955a14d800973c152 broke platforms using
embedded constant pools due to assumptions regarding stack frame
layout.

R=mtrofin@chromium.org, bmeurer@chromium.org, jarin@chromium.org, michael_dawson@ca.ibm.com
BUG=v8:4548
LOG=n

Committed: https://crrev.com/61a39335c6c315e26f8f8f35bf278266ffcecd6f
Cr-Commit-Position: refs/heads/master@{#31996}

[MTBrandyberry, 2015-11-13 22:24:04]

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

[commit-bot: I haz the power, 2015-11-13 22:24:13]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1442273002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1442273002/1

[Mircea Trofin, 2015-11-13 22:33:21]

On 2015/11/13 22:24:13, commit-bot: I haz the power wrote:
> Dry run: CQ is trying da patch. Follow status at
>  https://chromium-cq-status.appspot.com/patch-status/1442273002/1
> View timeline at
>  https://chromium-cq-status.appspot.com/patch-timeline/1442273002/1

LGTM

Thanks!

[commit-bot: I haz the power, 2015-11-13 22:48:48]

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

[commit-bot: I haz the power, 2015-11-13 22:48:49]

Dry run: This issue passed the CQ dry run.

[MTBrandyberry, 2015-11-13 22:50:03]

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

[commit-bot: I haz the power, 2015-11-13 22:50:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1442273002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1442273002/1

[commit-bot: I haz the power, 2015-11-13 22:51:22]

Committed patchset #1 (id:1)

[Hezley Khez, 2015-11-13 23:39:15]

On 2015/11/13 22:51:22, commit-bot: I haz the power wrote:
> Committed patchset #1 (id:1)

[Hezley Khez, 2015-11-13 23:40:47]

Go go

[commit-bot: I haz the power, 2015-11-14 23:22:03]

Patchset 1 (id:??) landed as
https://crrev.com/61a39335c6c315e26f8f8f35bf278266ffcecd6f
Cr-Commit-Position: refs/heads/master@{#31996}