PPC: VectorICs: allocating slots for store ics in ast nodes.

PPC: VectorICs: allocating slots for store ics in ast nodes.

Port 5450fc07ba07615a70f5ed8379dc23c3275d6fe3

Original commit message:
Also adapt code generation to pass the slot to the
store/keyed-store ic. AST nodes ObjectLiteral, Assignment,
ForEach, Call and CountOperation now include one or more
feedback vector ic slot ids.

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

Committed: https://crrev.com/e95a22564628d0d7d3fb8621a39fd99c365d5885
Cr-Commit-Position: refs/heads/master@{#28666}

[dstence, 2015-05-27 17:00:01]

lgtm

[MTBrandyberry, 2015-05-27 17:00:12]

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

[commit-bot: I haz the power, 2015-05-27 17:00:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1156503003/1

[commit-bot: I haz the power, 2015-05-27 17:26:25]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-27 17:26:36]

Patchset 1 (id:??) landed as
https://crrev.com/e95a22564628d0d7d3fb8621a39fd99c365d5885
Cr-Commit-Position: refs/heads/master@{#28666}