Non-simple parameters are only disallowed when a function declares itself
strict, but they're otherwise ok in strict mode.

Enabling these tests will expose more problems when scope data for arrow
functions is tested (in a future CL).

BUG=v8:5516
R=vogelheim@chromium.org

Change-Id: I839ad37d46305975a56aff20e8ca70505c16bf1d
Reviewed-on: https://chromium-review.googlesource.com/446497Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Commit-Queue: Daniel Vogelheim <vogelheim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43389}