This adds preliminary support for exception handling to the interpreter.
Note that due to missing reference type support, the exception object is
not yet correctly put onto the operand stack. Also exceptions raised by
call operations are not handled properly yet.

R=clemensh@chromium.org
TEST=cctest/test-run-wasm-exceptions
BUG=v8:8091

Change-Id: Ie68ca9448c7beafe8967dff5bb5de6642edcc9e4
Reviewed-on: https://chromium-review.googlesource.com/c/1436017
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59131}