[wasm] Introduce the TrapIf and TrapUnless operators to generate trap code.

src/external-reference-table.cc

Index: src/external-reference-table.cc
diff --git a/src/external-reference-table.cc b/src/external-reference-table.cc
index d14fd2f162b759cc98398b451a191ae6e9dcb85d..4c80116feb1b93de2226872e8c179c5b6ebd22e9 100644
--- a/src/external-reference-table.cc
+++ b/src/external-reference-table.cc
@@ -228,6 +228,8 @@ void ExternalReferenceTable::AddReferences(Isolate* isolate) {
       "f64_asin_wrapper");
   Add(ExternalReference::f64_mod_wrapper_function(isolate).address(),
       "f64_mod_wrapper");
+  Add(ExternalReference::wasm_call_trap_callback_for_testing(isolate).address(),
+      "wasm::call_trap_callback_for_testing");
   Add(ExternalReference::log_enter_external_function(isolate).address(),
       "Logger::EnterExternal");
   Add(ExternalReference::log_leave_external_function(isolate).address(),