moved benchmark lox files to separate folder

lox.t/benchmark/zoo_batch.lox

@@ -1,36 +0,0 @@
-class Zoo {
-  init() {
-    this.aarvark  = 1;
-    this.baboon   = 1;
-    this.cat      = 1;
-    this.donkey   = 1;
-    this.elephant = 1;
-    this.fox      = 1;
-  }
-  ant()    { return this.aarvark; }
-  banana() { return this.baboon; }
-  tuna()   { return this.cat; }
-  hay()    { return this.donkey; }
-  grass()  { return this.elephant; }
-  mouse()  { return this.fox; }
-}
-
-var zoo = Zoo();
-var sum = 0;
-var start = clock();
-var batch = 0;
-while (clock() - start < 10) {
-  for (var i = 0; i < 10000; i = i + 1) {
-    sum = sum + zoo.ant()
-              + zoo.banana()
-              + zoo.tuna()
-              + zoo.hay()
-              + zoo.grass()
-              + zoo.mouse();
-  }
-  batch = batch + 1;
-}
-
-print sum;
-print batch;
-print clock() - start;