bug#74192: [PATCH] build: update gnulib to latest, to enable faster crc

[Sam Russell]

Hi,

This patch updates to the latest version of gnulib and speeds up gzip by
about ~35%:

$ time ./gzip_old -c -d -k large_file.gz > /dev/null

real    0m0.502s
user    0m0.473s
sys     0m0.030s
$ time ./gzip_new -c -d -k large_file.gz > /dev/null

real    0m0.318s
user    0m0.303s
sys     0m0.010s

I'm not sure what your conventions are around updating submodules, I see
the last update was September 8, also related to CRC code.

A quick browse showed this commit might be an issue:

commit 134978bd830b73d9bd7698f8ec2442d541056df1
Author: Bruno Haible <bruno@clisp.org>
Date:   Mon Sep 9 15:46:44 2024 +0200

    striconv, striconveh: Drop workaround for glibc 2.1.

    * lib/striconv.c (str_iconv): Remove glibc-2.1 bug workaround.
    * lib/striconveh.c (iconveh_open): Likewise.

Not sure if that means glibc 2.1 is deprected, or what impact that might
have for gzip, but that seemed like the main thing that could be of concern.

Cheers
Sam

0001-build-update-gnulib-to-latest-to-enable-faster-crc.patch
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