fixes #427, static fields emitted outside the scope of their class

test/codegen/expect/fieldtest.js

 dart_library.library('fieldtest', null, /* Imports */[
   'dart/_runtime',
   'dart/core'
 ], /* Lazy imports */[
 ], function(exports, dart, core) {
   'use strict';
   let dartx = dart.dartx;
   class A extends core.Object {
     A() {
       this.x = 42;
@@ skipping 60 matching lines @@
   const Generic$ = dart.generic(function(T) {
     class Generic extends core.Object {
       foo(t) {
         dart.as(t, T);
         return core.print(dart.notNull(Generic$().bar) + dart.notNull(dart.as(t, core.String)));
       }
     }
     dart.setSignature(Generic, {
       methods: () => ({foo: [dart.dynamic, [T]]})
     });
+    Generic.bar = 'hello';
     return Generic;
   });
   let Generic = Generic$();
-  Generic.bar = 'hello';
   class StaticFieldOrder1 extends core.Object {}
   StaticFieldOrder1.d = 4;
-  StaticFieldOrder1.c = dart.notNull(StaticFieldOrder1.d) + 2;
-  StaticFieldOrder1.b = dart.notNull(StaticFieldOrder1.c) + 3;
-  StaticFieldOrder1.a = dart.notNull(StaticFieldOrder1.b) + 1;
+  dart.defineLazyProperties(StaticFieldOrder1, {
+    get a() {
+      return dart.notNull(StaticFieldOrder1.b) + 1;
+    },
+    get c() {
+      return dart.notNull(StaticFieldOrder1.d) + 2;
+    },
+    get b() {
+      return dart.notNull(StaticFieldOrder1.c) + 3;
+    }
+  });
   class StaticFieldOrder2 extends core.Object {}
   StaticFieldOrder2.d = 4;
-  StaticFieldOrder2.c = dart.notNull(StaticFieldOrder2.d) + 2;
-  StaticFieldOrder2.b = dart.notNull(StaticFieldOrder2.c) + 3;
-  StaticFieldOrder2.a = dart.notNull(StaticFieldOrder2.b) + 1;
+  dart.defineLazyProperties(StaticFieldOrder2, {
+    get a() {
+      return dart.notNull(StaticFieldOrder2.b) + 1;
+    },
+    get c() {
+      return dart.notNull(StaticFieldOrder2.d) + 2;
+    },
+    get b() {
+      return dart.notNull(StaticFieldOrder2.c) + 3;
+    }
+  });
   class MyEnum extends core.Object {
     MyEnum(index) {
       this.index = index;
     }
     toString() {
       return {
         0: "MyEnum.Val1",
         1: "MyEnum.Val2",
         2: "MyEnum.Val3",
         3: "MyEnum.Val4"
@@ skipping 24 matching lines @@
   exports.compute = compute;
   exports.BaseWithGetter = BaseWithGetter;
   exports.Derived = Derived;
   exports.Generic$ = Generic$;
   exports.Generic = Generic;
   exports.StaticFieldOrder1 = StaticFieldOrder1;
   exports.StaticFieldOrder2 = StaticFieldOrder2;
   exports.MyEnum = MyEnum;
   exports.main = main;
 });