This fixes [NAMED|KEYED]_SUPER_PROPERTY_CALL to perform a method call
instead of a function call. The difference is visible for sloppy mode
targets that convert primitive receivers.

R=rossberg@chromium.org
TEST=mjsunit/regress/regress-4525
BUG=v8:4525
LOG=n

Review URL: https://codereview.chromium.org/1419173004

Cr-Commit-Position: refs/heads/master@{#31664}