[wasm] Update spec tests

The spec repo version in DEPS now gets updated automatically by the
autoroller, but we still have to update the spec tests manually because
it requires ocaml. Updating the core spec tests is what this CL does.

There is a bug to also do this update automatically. It's on Sergiy's
list but does not have the highest priority.

R=titzer@chromium.org

Change-Id: I65085dcbca93d41d9f12c5ba227130197ebd203f
Reviewed-on: https://chromium-review.googlesource.com/c/1491219Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59891}

test/wasm-spec-tests/tests.tar.gz.sha1

-f6dd9e0d05ec9358b0932862606d0345da0f21f1
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+ed10dcd09ecd4e7c4fd4c0de1a2cbac60632c21b
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