Allow constant heap accesses in asm typer.

Allow constant heap accesses in asm typer.

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=test-asm-validator
R=titzer@chromium.org,aseemgarg@chromium.org
LOG=N

Committed: https://crrev.com/318bcbee31e031fe3a24256f935fb9dec7ff4ea6
Cr-Commit-Position: refs/heads/master@{#31908}

[titzer, 2015-11-10 01:02:07]

lgtm

[bradn, 2015-11-10 01:58:15]

The CQ bit was checked by bradnelson@google.com

[commit-bot: I haz the power, 2015-11-10 01:58:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1405993009/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1405993009/1

[commit-bot: I haz the power, 2015-11-10 01:59:49]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-10 02:00:13]

Patchset 1 (id:??) landed as
https://crrev.com/318bcbee31e031fe3a24256f935fb9dec7ff4ea6
Cr-Commit-Position: refs/heads/master@{#31908}