The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2018.02.05.20.23.47 christos src/crypto/external/bsd/openssl.old/dist/crypto/dh/dh.h,v 1.6 2018.02.05.20.27.06 christos src/crypto/external/bsd/openssl.old/dist/crypto/dsa/dsa.h,v 1.5 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2018.02.html#2018.02.05.20.27.06