The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2016.11.01.15.58.41 christos src/external/gpl3/binutils/lib/libiberty/Makefile,v 1.9 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2016.11.html#2016.11.01.15.58.41