Relax ABS tests when not running ART.

Rationale:
As a "quality of implementation", rather than pure "spec compliance",
ART's version of abs() clears the sign bit (but changes nothing else)
for all numbers, including NaN (signaling NaN may become quiet though).
We cannot expect non-ART implementations to do the same always though.

Test: 631, 645 host (ART and --jvm)
Bug: 74085456

Change-Id: I2d7db301c2820c60cfb879fc19079404194e53d1
2 files changed