autotools: Updage config.guess and config.sub

autotools: Updage config.guess and config.sub

The autoconf manual [1] specifies that as we define AC_CANONICAL_HOST we
must supply config.guess and config.sub. In which case let's update them
from [2] commit: b98424c24 "config.guess: Remove space after "#endif", as
Gnulib and some"

This allows us to support more achitectures (RISC-V) and other general
improvements.

1: https://www.gnu.org/software/autoconf/manual/autoconf.html#Canonicalizing
2: https://git.savannah.gnu.org/cgit/config.git/

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>