[foreign] RFR 8216743: Regression: Many panama foreign tests fail on Mac after fix for JDK-8216485

[Sundararajan Athijegannathan]

Please review.

Bug: https://bugs.openjdk.java.net/browse/JDK-8216743
Webrev: https://cr.openjdk.java.net/~sundar/8216743/webrev.00/

Moral: we've to test all the three platforms before pushing 
panama/foreign changes :)

Thanks,
-Sundar