Adds simulator debugger and Stop to arm64.

runtime/vm/stub_code.cc

Index: runtime/vm/stub_code.cc
===================================================================
--- runtime/vm/stub_code.cc	(revision 35070)
+++ runtime/vm/stub_code.cc	(working copy)
@@ -51,12 +51,9 @@
 
 
 void StubCode::InitOnce() {
-  // TODO(zra): ifndef to be removed when ARM64 port is ready.
-#if !defined(TARGET_ARCH_ARM64)
   // Generate all the stubs.
   Code& code = Code::Handle();
   VM_STUB_CODE_LIST(STUB_CODE_GENERATE);
-#endif
 }
 
 
@@ -70,12 +67,9 @@
 
 
 void StubCode::Init(Isolate* isolate) {
-  // TODO(zra): ifndef to be removed when ARM64 port is ready.
-#if !defined(TARGET_ARCH_ARM64)
   StubCode* stubs = new StubCode();
   isolate->set_stub_code(stubs);
   stubs->GenerateFor(isolate);
-#endif
 }