This makes sure {WasmCode} object are printed right after they have been
added to a {NativeModule} instead of waiting until the module is done.
This way debug output can be inspected as early as possible and works
even when there are issues later before the module is finished.

R=herhut@chromium.org
BUG=chromium:849713

Change-Id: Icced39cfaad7c033de569fbec21c26506f5796a6
Reviewed-on: https://chromium-review.googlesource.com/1088614Reviewed-by: Stephan Herhut <herhut@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53549}