Please update config.{sub,guess} in release tarballs

[hack3ric]

I am building LDCproc on Arch Linux RISC-V and the outdated files are unable to detect new platforms like riscv64:

checking build system type... ./config.guess: unable to guess system type

This script, last modified 2014-03-23, has failed to recognize
the operating system you are using. It is advised that you
download the most up to date version of the config scripts from

  http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD
and
  http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEAD

If the version you run (./config.guess) is already up to date, please
send the following data and any information you think might be
pertinent to <config-patches@gnu.org> in order to provide the needed
information to handle your system.

config.guess timestamp = 2014-03-23

uname -m = riscv64
uname -r = 6.1.61-3-sophgo-multi-08357-g369f7207fe69
uname -s = Linux
uname -v = #1 SMP Sat, 30 Dec 2023 06:54:24 +0000

/usr/bin/uname -p = unknown
/bin/uname -X     = 

hostinfo               = 
/bin/universe          = 
/usr/bin/arch -k       = 
/bin/arch              = 
/usr/bin/oslevel       = 
/usr/convex/getsysinfo = 

UNAME_MACHINE = riscv64
UNAME_RELEASE = 6.1.61-3-sophgo-multi-08357-g369f7207fe69
UNAME_SYSTEM  = Linux
UNAME_VERSION = #1 SMP Sat, 30 Dec 2023 06:54:24 +0000
configure: error: cannot guess build type; you must specify one

Please update these files in the next release (if any). Thanks!