The typing rule for JSCreateArguments must properly declare rest
parameters as arrays and only consider sloppy and strict arguments
objects as Type::OtherObject.

TBR=jarin@chromium.org
BUG=v8:6262,chromium:712802

Review-Url: https://codereview.chromium.org/2828573004
Cr-Commit-Position: refs/heads/master@{#44712}