Add compiler field to code print output.

BUG=

Review URL: https://codereview.chromium.org/1151883004

Cr-Commit-Position: refs/heads/master@{#28824}

src/objects.cc

@@ -11619,6 +11619,12 @@ void Code::Disassemble(const char* name, std::ostream& os) {  // NOLINT
   if (kind() == OPTIMIZED_FUNCTION) {
     os << "stack_slots = " << stack_slots() << "\n";
   }
+  os << "compiler = " << (is_turbofanned()
+                              ? "turbofan"
+                              : is_crankshafted() ? "crankshaft"
+                                                  : kind() == Code::FUNCTION
+                                                        ? "full-codegen"
+                                                        : "unknown") << "\n";
 
   os << "Instructions (size = " << instruction_size() << ")\n";
   {