Reland Vector ICs: platform support for vector-based stores.

Reland Vector ICs: platform support for vector-based stores.

The last changes for vector store functionality, they are in 3 areas:

1) The new vector [keyed] store code stubs - implementation.
2) IC and handler compiler adjustments
3) Odds and ends. A change in ast.cc, a test update, a small Oracle fix.

TBR=bmeurer@chromium.org, jkummerow@chromium.org
BUG=

Committed: https://crrev.com/40fbed0609ddb3e4ee4338049383004b62d13853
Cr-Commit-Position: refs/heads/master@{#30581}

[mvstanton, 2015-09-04 08:12:15]

Reland with fix for ARM and ARM64 release build failure.
Thx,
--Michael

[mvstanton, 2015-09-04 08:12:28]

The CQ bit was checked by mvstanton@chromium.org

[commit-bot: I haz the power, 2015-09-04 08:12:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1319123004/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1319123004/20001

[Jakob Kummerow, 2015-09-04 08:15:35]

lgtm

[Benedikt Meurer, 2015-09-04 08:23:28]

lgtm

[commit-bot: I haz the power, 2015-09-04 08:36:35]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-09-04 08:36:51]

Patchset 2 (id:??) landed as
https://crrev.com/40fbed0609ddb3e4ee4338049383004b62d13853
Cr-Commit-Position: refs/heads/master@{#30581}