The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2018.10.10.06.16.55 martin src/crypto/external/bsd/openssl/include/openssl/opensslconf.h,v 1.4 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2018.10.html#2018.10.10.06.16.55