The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2016.09.22.08.43.26 mlelstv src/usr.sbin/mdsetimage/mdsetimage.c,v 1.23 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2016.09.html#2016.09.22.08.43.26