This makes sure that the observable property order of the module export
maintains insertion order. Now that properties are configurable, we no
longer need to reverse the export processing.

R=clemensh@chromium.org
TEST=mjsunit/asm/asm-validation
BUG=chromium:715420

Change-Id: Ib2024254c07bdad7fee1cf2fa0bd3e847721f5b5
Reviewed-on: https://chromium-review.googlesource.com/488022Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44891}