More ifdefs to make everything build at -O0 and without --gc-sections.

runtime/lib/mirrors.cc

Index: runtime/lib/mirrors.cc
diff --git a/runtime/lib/mirrors.cc b/runtime/lib/mirrors.cc
index 8a4078a984b75d3b6e0a98a15d05bfae2b292cb6..032e8c98dc54cce7bef2441bc11ef5fe22f9a690 100644
--- a/runtime/lib/mirrors.cc
+++ b/runtime/lib/mirrors.cc
@@ -20,7 +20,7 @@
 
 namespace dart {
 
-#ifndef PRODUCT
+#if !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
 
 #define PROPAGATE_IF_MALFORMED(type)                                           \
   if (type.IsMalformed()) {                                                    \
@@ -2092,6 +2092,6 @@ DEFINE_NATIVE_ENTRY(TypeMirror_subtypeTest, 2) {
   return Bool::Get(a.IsSubtypeOf(b, NULL, NULL, Heap::kNew)).raw();
 }
 
-#endif  // !PRODUCT
+#endif  // !PRODUCT && !DART_PRECOMPILED_RUNTIME
 
 }  // namespace dart