Snippets for emacs 31.1 from Alpine riscv64

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-riscv64/community/emacs/emacs-31.1-r0.log.

• /usr/include/fortify/string.h:70:16: warning: '__orig_memmove' specified size between 9223372036854775808 and 18446744073709551615 exceeds maximum object size 9223372036854775807 [-Wstringop-overflow=]
     70 |         return __orig_memmove(__d, __s, __n);
        |                ^
  

• /usr/include/fortify/string.h:70:16: warning: '__orig_memmove' specified size between 9223372036854775808 and 18446744073709551615 exceeds maximum object size 9223372036854775807 [-Wstringop-overflow=]