Eliminate dependencies on assemblers and code stubs in precompiled runtime.

runtime/vm/intrinsifier_x64.cc

Index: runtime/vm/intrinsifier_x64.cc
diff --git a/runtime/vm/intrinsifier_x64.cc b/runtime/vm/intrinsifier_x64.cc
index 3b97a1bf80b551b928e90e98d4abb018a306f006..91b27164c401163efdd17914e1f333e6f471c5d2 100644
--- a/runtime/vm/intrinsifier_x64.cc
+++ b/runtime/vm/intrinsifier_x64.cc
@@ -3,7 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_X64.
-#if defined(TARGET_ARCH_X64)
+#if defined(TARGET_ARCH_X64) && !defined(DART_PRECOMPILED_RUNTIME)
 
 #include "vm/intrinsifier.h"
 
@@ -2325,4 +2325,4 @@ void Intrinsifier::SetAsyncThreadStackTrace(Assembler* assembler) {
 
 }  // namespace dart
 
-#endif  // defined TARGET_ARCH_X64
+#endif  // defined(TARGET_ARCH_X64) && !defined(DART_PRECOMPILED_RUNTIME)