wasm: hook module dump to run-tests.py

tools/run-tests.py

Index: tools/run-tests.py
diff --git a/tools/run-tests.py b/tools/run-tests.py
index a380c97ad3951d8f4784eb4c9d199b14b7849656..6e29226ab6c6a08961889201ea0cc4875de900e8 100755
--- a/tools/run-tests.py
+++ b/tools/run-tests.py
@@ -357,6 +357,12 @@ def BuildOptions():
   result.add_option("--msan",
                     help="Regard test expectations for MSAN",
                     default=False, action="store_true")
+  result.add_option("--dump-wasm-module", dest="dump_wasm_module",
+                    help="dump WASM module bytes",
+                    default=False, action="store_true")
+  result.add_option("--dump-wasm-module-path", dest="dump_wasm_module_path",
+                    help="directory to dump wasm modules to",
+                    default="")
   return result
 
 
@@ -695,6 +701,8 @@ def Execute(arch, mode, args, options, suites):
                         options.rerun_failures_max,
                         options.predictable,
                         options.no_harness,
+                        options.dump_wasm_module,
+                        options.dump_wasm_module_path,
                         use_perf_data=not options.swarming,
                         sancov_dir=options.sancov_dir)