Change detection of counter overflow in nterp x64.

To better play with different thresholds (currently changing the counter
in the source, but soon through command line), 'and' the counter with the
hotness before comparing to zero.

Test: test.py
Bug: 112676029
Change-Id: I1f85a3dbd7423b08f69839301465e1ebbcc8d69a
2 files changed