RFR [8u60] 8077674: BSD build failures due to undefined macros

[David Holmes]

Please approve this simple backport. The patch from 9 had to be hand 
edited in places due indentation differences, but the end result is the 
same.

Bug: https://bugs.openjdk.java.net/browse/JDK-8077674

8u webrev: http://cr.openjdk.java.net/~dholmes/8077674/webrev.8u/

Original 9 changeset: 
http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/793493726a06

Thanks,
David