Configure fails on 32-bit ARM NetBSD due to outdated ICU config.guess/config.sub

[alarixnia]

intl/icu/target> configure: creating cache /pbulk/work/www/arcticfox/work/build/intl/icu/target/config.cache
intl/icu/target> checking for ICU version numbers... release 58.2, library 58.2, unicode version 9.0
intl/icu/target> checking build system type... Invalid configuration `armv7--netbsdelf-eabihf': machine `armv7--netbsdelf' not recognized
intl/icu/target> configure: error: /bin/sh /pbulk/work/www/arcticfox/work/Arctic-Fox-39.2/intl/icu/source/config.sub armv7--netbsdelf-eabihf failed

It looks like config.guess and config.sub need to be updated for ICU, as in this commit:

unicode-org/icu@d6401dd