java/openjdk8 build failure in lib/NetworkingLibraries.gmk

[Roger Marquis]

Anyone else seeing this in 9.3-RELEASE on amd64?

  # /usr/ports/java/openjdk8> make
  /usr/ports/java/openjdk8/work/openjdk/jdk/src/solaris/native/java/net/PlainDatagramSocketImpl.c: In function 'mcast_join_leave':
  /usr/ports/java/openjdk8/work/openjdk/jdk/src/solaris/native/java/net/PlainDatagramSocketImpl.c:2185: warning: pointer targets in passing argument 3 of 'getInet6Address_ipaddress' differ in signedness
  In file included from /usr/ports/java/openjdk8/work/openjdk/jdk/src/solaris/native/java/net/NetworkInterface.c:72:
  /usr/include/net/if_var.h:178: error: field 'if_snd' has incomplete type
  gmake[2]: *** [lib/NetworkingLibraries.gmk:66:
  /usr/ports/java/openjdk8/work/openjdk/build/bsd-x86_64-normal-server-release/jdk/objs/libnet/NetworkInterface.o] Error 1
  gmake[2]: *** Waiting for unfinished jobs....
  gmake[1]: *** [BuildJdk.gmk:70: libs-only] Error 2
  gmake: *** [/usr/ports/java/openjdk8/work/openjdk//make/Main.gmk:120: jdk-only] Error 2
  ===> Compilation failed unexpectedly.

Roger