test/Array/concat2.baseline

-------concat Small-------------
- concat 101, 102, 103, 104, 105
length: 505
  499: 100
  500: 101
  501: 102
  502: 103
  503: 104
  504: 105
- arr.concat(arr)
length: 1010
  499: 100
  500: 101
  501: 102
  502: 103
  503: 104
  504: 105
  1004: 100
  1005: 101
  1006: 102
  1007: 103
  1008: 104
  1009: 105
-------test prototype lookup-------------
a: 200,101,202,203,204,105,106,207
r: 200,101,202,203,204,105,106,207,300,301,302,303,304
r: 200,101,202,203,204,105,106,207,108,301,302,303,304
r: 200,101,202,203,204,105,106,207,,301,302,303,304