Update babylon.sceneSerializer.ts

Name to particle system

src/Tools/babylon.sceneSerializer.ts

@@ -377,6 +377,7 @@
     var serializeParticleSystem = (particleSystem: ParticleSystem): any => {
         var serializationObject: any = {};
 
+        serializationObject.name = particleSystem.name;
         serializationObject.emitterId = particleSystem.emitter.id;
         serializationObject.capacity = particleSystem.getCapacity();