[turbofan] Remove use of CallFunctionStub from TurboFan.

[turbofan] Remove use of CallFunctionStub from TurboFan.

Use the Call builtin instead, which does the right thing(TM)
always, especially since the CallFunctionStub is going away.

R=jarin@chromium.org
BUG=v8:4413
LOG=n

Committed: https://crrev.com/309c36f5a999af32bd0303fc60e5ee02edf9d21b
Cr-Commit-Position: refs/heads/master@{#31794}

[Jarin, 2015-11-04 14:51:42]

lgtm

[Benedikt Meurer, 2015-11-04 14:51:55]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2015-11-04 14:52:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1410853007/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1410853007/1

[commit-bot: I haz the power, 2015-11-04 15:04:22]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-04 15:05:01]

Patchset 1 (id:??) landed as
https://crrev.com/309c36f5a999af32bd0303fc60e5ee02edf9d21b
Cr-Commit-Position: refs/heads/master@{#31794}