Fix %OptimizeFunctionOnNextCall wrt concurrent compilation.

Fix %OptimizeFunctionOnNextCall wrt concurrent compilation.

If a function is marked or queued for concurrent compilation,
%OptimizeFunctionOnNextCall becomes a no-op. That can be wrong
if concurrent recompilation does not complete at the time we
expect the function to have been optimized.

R=hpayer@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=19100

[Hannes Payer (out of office), 2014-02-05 12:16:16]

lgtm

[Yang, 2014-02-05 12:19:34]

Committed patchset #1 manually as r19100 (presubmit successful).