fix FunctionCallbackInfo ambiguity

fix FunctionCallbackInfo ambiguity

- when compiling tools that embed v8 with g++ FunctionCallbackInfo is currently ambigous
- more info: https://github.com/joyent/node/issues/7337
- original patch is here: https://codereview.appspot.com/78770045/

TBR=svenpanne@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=20217

[dcarney, 2014-03-24 19:37:06]

Committed patchset #1 manually as r20217 (presubmit successful).

[Sven Panne, 2014-03-25 06:49:48]

lgtm