add models for reduceRight and filter

com.ibm.wala.cast.js/dat/prologue.js

@@ -378,7 +378,38 @@ Array$proto$__WALA__ = {
 	    }
 	  }
 	  return result;
+  },
+
+  reduceRight: function Array_prototype_reduceRight(arg1, arg2) {
+	  var result = arg2;
+	  var n0 = this.length;
+	  for (var i = 0; i < n0; i += 1) {
+	    var n1 = ((n0-i)-1) in this;
+	    if (n1) {
+	      var n2 = this[(n0-i)-1];
+	      var n3 = arg1.call(undefined, result, n2, (n0-i)-1, this);
+	      result = n3;
+	    }
+	  }
+	  return result;
+  },
+
+  filter: function Array_prototype_filter(arg1, arg2) {
+	  var result = [];
+	  var n0 = this.length;
+	  for (var i = 0; i < n0; i += 1) {
+	    var n1 = i in this;
+	    if (n1) {
+	      var n2 = this[i];
+	      var n3 = arg1.call(arg2, n2, i, this);
+	      if (n3) {
+	        result[result.length] = n2;
+	      }
+	    }
+	  }
+	  return result;
   }
+
 };
 
 Array.isArray = function Array_isArray(a) {