Avoid disassembling Interpreted Regexp code

I found that v8 will crash when --print-code is turned on while Regexp
is interpreted. It crashes when trying to print Relocation info during
Disassembly. It should probably avoid printing out disassembly when the
Code object is a bytecode regexp.

Bug: 
Change-Id: I35b531cb03996a303248652871452266c78fee38
Reviewed-on: https://chromium-review.googlesource.com/642127Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Jaideep Bajwa <bjaideep@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#47718}

src/regexp/jsregexp.cc

@@ -1088,7 +1088,7 @@ RegExpEngine::CompilationResult RegExpCompiler::Assemble(
   Handle<HeapObject> code = macro_assembler_->GetCode(pattern);
   isolate->IncreaseTotalRegexpCodeGenerated(code->Size());
   work_list_ = NULL;
-#ifdef ENABLE_DISASSEMBLER
+#if defined(ENABLE_DISASSEMBLER) && !defined(V8_INTERPRETED_REGEXP)
   if (FLAG_print_code) {
     CodeTracer::Scope trace_scope(isolate->GetCodeTracer());
     OFStream os(trace_scope.file());