Snippets for nano 9.1 from Alpine s390x

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-s390x/main/nano/nano-9.1-r0.log.

• mbiter-aux.c:32:41: warning: '/*' within comment [-Wcomment]
     32 |          to U+0100.  (See libiconv/tests/*.TXT for all the mapping tables.)