Add noise channel to save state serialization

Author: remutro

ares/fc/apu/serialization.cpp

@@ -3,6 +3,7 @@ auto APU::serialize(serializer& s) -> void {
   s(pulse1);
   s(pulse2);
   s(triangle);
+  s(noise);
   s(dmc);
   s(frame);
 }

ares/fc/system/serialization.cpp

@@ -1,4 +1,4 @@
-static const string SerializerVersion = "v150";
+static const string SerializerVersion = "v151";
 
 auto System::serialize(bool synchronize) -> serializer {
   if(synchronize) scheduler.enter(Scheduler::Mode::Synchronize);