X87: [interpreter] Add Interpreter{Entry,Exit}Trampoline builtins.

X87: [interpreter] Add Interpreter{Entry,Exit}Trampoline builtins.

port c5dd553cf3a44cd8c17958a595198b5ea9492cd0 (r29929).

original commit message:

    Adds interpreter entry and exit trampoline builtins. Also implements the
    Return bytecode handler and fixes a few bugs in InterpreterAssembler
    highlighted by running on other architectures.

BUG=

Committed: https://crrev.com/230d0845b7012bb404d013d0fce9d07fb83f62e2
Cr-Commit-Position: refs/heads/master@{#29943}

[chunyang.dai, 2015-07-31 03:10:39]

chunyang.dai@intel.com changed reviewers:
+ weiliang.lin@intel.com

[chunyang.dai, 2015-07-31 03:10:39]

PTAL

[Weiliang, 2015-07-31 03:50:26]

The CQ bit was checked by weiliang.lin@intel.com

[Weiliang, 2015-07-31 03:50:27]

lgtm

[commit-bot: I haz the power, 2015-07-31 03:50:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1271433002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1271433002/1

[commit-bot: I haz the power, 2015-07-31 05:22:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-31 05:22:40]

Patchset 1 (id:??) landed as
https://crrev.com/230d0845b7012bb404d013d0fce9d07fb83f62e2
Cr-Commit-Position: refs/heads/master@{#29943}