Adds Stop to MIPS. Starts on MIPS call patcher.

runtime/vm/stub_code.cc

Index: runtime/vm/stub_code.cc
===================================================================
--- runtime/vm/stub_code.cc	(revision 20500)
+++ runtime/vm/stub_code.cc	(working copy)
@@ -50,26 +50,16 @@
 
 
 void StubCode::InitOnce() {
-  // TODO(regis): Re-enable this after we are able to generate mips code.
-#if defined(TARGET_ARCH_IA32) ||                                               \
-    defined(TARGET_ARCH_X64) ||                                                \
-    defined(TARGET_ARCH_ARM)
   // Generate all the stubs.
   Code& code = Code::Handle();
   VM_STUB_CODE_LIST(STUB_CODE_GENERATE);
-#endif
 }
 
 
 void StubCode::GenerateFor(Isolate* init) {
-  // TODO(regis): Re-enable this after we are able to generate mips code.
-#if defined(TARGET_ARCH_IA32) ||                                               \
-    defined(TARGET_ARCH_X64) ||                                                \
-    defined(TARGET_ARCH_ARM)
   // Generate all the stubs.
   Code& code = Code::Handle();
   STUB_CODE_LIST(STUB_CODE_GENERATE);
-#endif
 }
 
 #undef STUB_CODE_GENERATE