Change JIT code to use optimizing.

Obviously, will fall back to quick for most methods currently,
due to lack of -QUICK opcodes support.

Change-Id: I28882fbe805cd907275b6047437d9639a475964a
diff --git a/runtime/oat_file_assistant.cc b/runtime/oat_file_assistant.cc
index b28adf9..df0cf45 100644
--- a/runtime/oat_file_assistant.cc
+++ b/runtime/oat_file_assistant.cc
@@ -698,18 +698,13 @@
     return false;
   }
 
-  ClassLinker* linker = runtime->GetClassLinker();
-  CHECK(linker != nullptr) << "ClassLinker is not created yet";
-  const OatFile* primary_oat_file = linker->GetPrimaryOatFile();
-  const bool debuggable = primary_oat_file != nullptr && primary_oat_file->IsDebuggable();
-
   std::vector<std::string> argv;
   argv.push_back(runtime->GetCompilerExecutable());
   argv.push_back("--runtime-arg");
   argv.push_back("-classpath");
   argv.push_back("--runtime-arg");
   argv.push_back(runtime->GetClassPathString());
-  if (debuggable) {
+  if (runtime->IsDebuggable()) {
     argv.push_back("--debuggable");
   }
   runtime->AddCurrentRuntimeFeaturesAsDex2OatArguments(&argv);