The callees are expected to properly set the number of actual
arguments passed to the callee, which is now represented correctly
in the TurboFan graphs by a new Parameter right before the context
Parameter.  Currently this is only being used for outgoing calls.

Note that this requires disabling two of the TF code stub tests,
because of the JavaScript graphs are not automagically compatible
with abitrary (incoming) code stub interface descriptors.  If we
want to support JS code stubs at all, then we need to find a sane
way to feed in this information.

Drive-by-fix: Don't insert a direct call to a classConstructor.

R=mstarzinger@chromium.org
BUG=v8:4413, v8:4428
LOG=n

Review URL: https://codereview.chromium.org/1410633006

Cr-Commit-Position: refs/heads/master@{#31789}