Bootstrapper previously created %ThrowTypeError% before the strict
function maps existed, so making that function strict required a small
amount of code reordering.

This fixes a few test262 tests, but we're still non-compliant due to the
fact that we have two functions instead of one (see issue 4034).

BUG=v8:4925
LOG=y

Review-Url: https://codereview.chromium.org/2006733004
Cr-Commit-Position: refs/heads/master@{#36526}