The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2017.01.17.07.53.06 ozaki-r src/sys/net/route.c,v 1.187 2017.01.17.08.10.37 ozaki-r src/sys/rump/librump/rumpnet/Makefile.rumpnet,v 1.20 2017.01.17.08.10.37 ozaki-r src/sys/rump/net/lib/libnet/Makefile,v 1.30 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2017.01.html#2017.01.17.08.10.37