PPC: [builtins] Remove the weird STACK_OVERFLOW builtin.

PPC: [builtins] Remove the weird STACK_OVERFLOW builtin.

Port 39604dda567b9ba9f4dcfe42f95471f30ec7cb6b

Original commit message:
    Just use a %ThrowStackOverflow runtime function instead, which
    does the trick, especially since the Isolate already has a
    preallocated StackOverflow error for that.

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

Committed: https://crrev.com/62ab109d188eeba7e941d731b63a3948d1c9353d
Cr-Commit-Position: refs/heads/master@{#30697}

[MTBrandyberry, 2015-09-11 14:25:08]

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

[commit-bot: I haz the power, 2015-09-11 14:25:15]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1334303002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1334303002/1

[commit-bot: I haz the power, 2015-09-11 14:54:21]

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

[commit-bot: I haz the power, 2015-09-11 14:54:21]

Dry run: This issue passed the CQ dry run.

[john.yan, 2015-09-11 15:05:50]

lgtm

[MTBrandyberry, 2015-09-11 15:06:08]

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

[commit-bot: I haz the power, 2015-09-11 15:06:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1334303002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1334303002/1

[commit-bot: I haz the power, 2015-09-11 15:08:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-11 15:09:11]

Patchset 1 (id:??) landed as
https://crrev.com/62ab109d188eeba7e941d731b63a3948d1c9353d
Cr-Commit-Position: refs/heads/master@{#30697}