The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2017.01.06.20.27.19 christos src/tools/dbsym/Makefile,v 1.11 2017.01.06.20.27.19 christos src/tools/mdsetimage/Makefile,v 1.13 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2017.01.html#2017.01.06.20.27.19