Merge "ART: Print jit memory use only if we have samples" am: 1704a18ce8
am: 50f86047f3

* commit '50f86047f3abd9bf6ced5ade77f713392e8276d6':
  ART: Print jit memory use only if we have samples

Change-Id: I2d0e4ad347e91e3ad8c1ceff38c4bb272d7c76e1