The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2017.06.08.18.57.21 skrll src/external/gpl2/dtc/Makefile.inc,v 1.2 2017.06.08.18.57.21 skrll src/external/gpl2/dtc/lib/libfdt/Makefile,v 1.3 2017.06.08.18.57.21 skrll src/external/gpl2/dtc/usr.bin/dtc/Makefile,v 1.2 2017.06.08.19.17.38 abhinav src/share/dict/web2,v 1.30 2017.06.08.19.21.54 mrg src/external/gpl3/gcc/usr.bin/gcc/arch/mips64el/auto-host.h,v 1.11 2017.06.08.19.21.54 mrg src/external/gpl3/gcc/usr.bin/gcc/arch/mips64el/configargs.h,v 1.21 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2017.06.html#2017.06.08.19.21.54