[WASM] Adding fuzzing binaries for wasm, and script to update them.

tools/update-wasm-fuzzers.sh

+#!/bin/bash
+# Copyright 2016 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+set -e
+
+TOOLS_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+cd ${TOOLS_DIR}/..
+
+rm -rf test/fuzzer/wasm
+rm -rf test/fuzzer/wasm_asmjs
+
+make x64.debug -j
+
+mkdir -p test/fuzzer/wasm
+mkdir -p test/fuzzer/wasm_asmjs
+
+# asm.js
+./tools/run-tests.py -j8 --variants=default --timeout=10 --arch=x64 \
+  --mode=debug --no-presubmit --extra-flags="--dump-wasm-module \
+  --dump-wasm-module-path=./test/fuzzer/wasm_asmjs/" mjsunit/wasm/asm*
+./tools/run-tests.py -j8 --variants=default --timeout=10 --arch=x64 \
+  --mode=debug --no-presubmit --extra-flags="--dump-wasm-module \
+  --dump-wasm-module-path=./test/fuzzer/wasm_asmjs/" mjsunit/asm/*
+./tools/run-tests.py -j8 --variants=default --timeout=10 --arch=x64 \
+  --mode=debug --no-presubmit --extra-flags="--dump-wasm-module \
+  --dump-wasm-module-path=./test/fuzzer/wasm_asmjs/" mjsunit/regress/asm/*
+# WASM
+./tools/run-tests.py -j8 --variants=default --timeout=10 --arch=x64 \
+  --mode=debug --no-presubmit --extra-flags="--dump-wasm-module \
+  --dump-wasm-module-path=./test/fuzzer/wasm/" unittests
+./tools/run-tests.py -j8 --variants=default --timeout=10 --arch=x64 \
+  --mode=debug --no-presubmit --extra-flags="--dump-wasm-module \
+  --dump-wasm-module-path=./test/fuzzer/wasm/" mjsunit/wasm/*
+./tools/run-tests.py -j8 --variants=default --timeout=10 --arch=x64 \
+  --mode=debug --no-presubmit --extra-flags="--dump-wasm-module \
+  --dump-wasm-module-path=./test/fuzzer/wasm/" \
+  $(cd test/; ls cctest/wasm/test-*.cc | \
+  sed -es/wasm\\///g | sed -es/[.]cc/\\/\\*/g)
+
+# Delete items over 20k.
+for x in $(find ./test/fuzzer/wasm/ -type f -size +20k)
+do
+  rm $x
+done
+for x in $(find ./test/fuzzer/wasm_asmjs/ -type f -size +20k)
+do
+  rm $x
+done
+
+# Upload changes.
+cd test/fuzzer
+upload_to_google_storage.py -a -b v8-wasm-fuzzer wasm
+upload_to_google_storage.py -a -b v8-wasm-asmjs-fuzzer wasm_asmjs