The trap handler is only needed for WebAssembly, hence it can be
excluded in no-wasm builds (v8_enable_webassembly = false).
This makes it easier to port WebAssembly to platforms that do not need
to support WebAssembly.

R=ahaas@chromium.org, jkummerow@chromium.org
CC=johnx@google.com

Bug: v8:11877
Change-Id: I25c34c2c4f1122227047e13add532ee2b9f73d2f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2953285Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75101}