Don't just blindly bake in CallIC feedback in the JSCallReducer,
but instead try to estimate first whether it makes sense to bake
it in (and risk potential eager deoptimization exits). We already
didn't use the CallIC feedback when the call target is a known
constant, but we should also not use it if the target is a
JSCreateClosure node or a Phi of known constants / JSCreateClosure
nodes.

R=jarin@chromium.org
BUG=v8:5267

Review-Url: https://codereview.chromium.org/2721483003
Cr-Commit-Position: refs/heads/master@{#43443}