PPC: [Interpreter] Add CallRuntime support to the interpreter.

PPC: [Interpreter] Add CallRuntime support to the interpreter.

Port 75f6ad74b2c0fe2e5dec7110d076d892cfbb6b69

Original commit message:
    Adds support for calling runtime functions from the interpreter. Adds the
    CallRuntime bytecode which takes a Runtime::FunctionId of the function to call
    and the arguments in sequential registers. Adds a InterpreterCEntry builtin
    to enable the interpreter to enter C++ code based on the functionId.

    Also renames Builtin::PushArgsAndCall to Builtin::InterpreterPushArgsAndCall
    and groups all the interpreter builtins together.

R=rmcilroy@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, dstence@us.ibm.com
BUG=v8:4280
LOG=N

Committed: https://crrev.com/f3f940f4358a09193d2869baf03cc88ddcc622bb
Cr-Commit-Position: refs/heads/master@{#31098}

[MTBrandyberry, 2015-10-02 22:50:14]

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

[commit-bot: I haz the power, 2015-10-02 22:50:26]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1384483004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1384483004/1

[commit-bot: I haz the power, 2015-10-02 23:13:12]

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

[commit-bot: I haz the power, 2015-10-02 23:13:13]

Dry run: This issue passed the CQ dry run.

[michael_dawson, 2015-10-05 13:26:09]

On 2015/10/02 23:13:13, commit-bot: I haz the power wrote:
> Dry run: This issue passed the CQ dry run.

lgtm

[MTBrandyberry, 2015-10-05 13:39:38]

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

[commit-bot: I haz the power, 2015-10-05 13:39:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1384483004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1384483004/1

[commit-bot: I haz the power, 2015-10-05 14:03:46]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-05 14:04:07]

Patchset 1 (id:??) landed as
https://crrev.com/f3f940f4358a09193d2869baf03cc88ddcc622bb
Cr-Commit-Position: refs/heads/master@{#31098}