[parser] Skipping inner funcs: add tests for strict mode.

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

Change-Id: I7a39e49cc569b87064e5ac6764f4e3a65b2c6d11
Reviewed-on: https://chromium-review.googlesource.com/444765Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43311}