hg: bsd-port/bsd-port/hotspot: . Define _XOPEN_SOURCE on Mac OSX. This appears to be required to pull in

[glewis at eyesbeyond.com]

Changeset: e57bd1cf5c9a
Author:    glewis at misty.eyesbeyond.com
Date:      2009-09-12 22:26 -0700
URL:       http://hg.openjdk.java.net/bsd-port/bsd-port/hotspot/rev/e57bd1cf5c9a

. Define _XOPEN_SOURCE on Mac OSX.  This appears to be required to pull in
  the ucontext functions on 10.6 aka Snow Leopard.

! make/bsd/makefiles/vm.make