package/libxcrypt: fix another build issue with perl >= 5.38

perl 5.38 deprecated smartmatch (~~ and the given/when syntax).
Backport another upstream patch to drop uses of given.

Fixes:
- http://autobuild.buildroot.net/results/727/727aa831881af36394bafef9e13a0dcbd9d0db3a

Signed-off-by: Daniel Lang <dalang@gmx.at>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libxcrypt/0002-Remove-smartmatch-usage-from-gen-crypt-h.patch

@@ -0,0 +1,61 @@
+From 95d6e03ae37f4ec948474d111105bbdd2938aba2 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Andreas=20K=2E=20H=C3=BCttel?= <dilfridge@gentoo.org>
+Date: Sun, 25 Jun 2023 01:35:08 +0200
+Subject: [PATCH] Remove smartmatch usage from gen-crypt-h
+
+Needed for Perl 5.38
+
+Upstream: https://github.com/besser82/libxcrypt/commit/95d6e03ae37f4ec948474d111105bbdd2938aba2
+Signed-off-by: Daniel Lang <dalang@gmx.at>
+---
+ build-aux/scripts/gen-crypt-h | 31 ++++++++++++++-----------------
+ 1 file changed, 14 insertions(+), 17 deletions(-)
+
+diff --git a/build-aux/scripts/gen-crypt-h b/build-aux/scripts/gen-crypt-h
+index 12aecf6d..b113b791 100644
+--- a/build-aux/scripts/gen-crypt-h
++++ b/build-aux/scripts/gen-crypt-h
+@@ -12,7 +12,6 @@ use v5.14;    # implicit use strict, use feature ':5.14'
+ use warnings FATAL => 'all';
+ use utf8;
+ use open qw(:std :utf8);
+-no  if $] >= 5.018, warnings => 'experimental::smartmatch';
+ no  if $] >= 5.022, warnings => 'experimental::re_strict';
+ use if $] >= 5.022, re       => 'strict';
+
+@@ -37,22 +36,20 @@ sub process_config_h {
+     local $_;
+     while (<$fh>) {
+         chomp;
+-        # Yes, 'given $_' is really required here.
+-        given ($_) {
+-            when ('#define HAVE_SYS_CDEFS_H 1') {
+-                $have_sys_cdefs_h = 1;
+-            }
+-            when ('#define HAVE_SYS_CDEFS_BEGIN_END_DECLS 1') {
+-                $have_sys_cdefs_begin_end_decls = 1;
+-            }
+-            when ('#define HAVE_SYS_CDEFS_THROW 1') {
+-                $have_sys_cdefs_throw = 1;
+-            }
+-            when (/^#define PACKAGE_VERSION "((\d+)\.(\d+)\.\d+)"$/) {
+-                $substs{XCRYPT_VERSION_STR}   = $1;
+-                $substs{XCRYPT_VERSION_MAJOR} = $2;
+-                $substs{XCRYPT_VERSION_MINOR} = $3;
+-            }
++
++        if ($_ eq '#define HAVE_SYS_CDEFS_H 1') {
++            $have_sys_cdefs_h = 1;
++        }
++        elsif ($_ eq '#define HAVE_SYS_CDEFS_BEGIN_END_DECLS 1') {
++            $have_sys_cdefs_begin_end_decls = 1;
++        }
++        elsif ($_ eq '#define HAVE_SYS_CDEFS_THROW 1') {
++            $have_sys_cdefs_throw = 1;
++        }
++        elsif (/^#define PACKAGE_VERSION "((\d+)\.(\d+)\.\d+)"$/) {
++            $substs{XCRYPT_VERSION_STR}   = $1;
++            $substs{XCRYPT_VERSION_MAJOR} = $2;
++            $substs{XCRYPT_VERSION_MINOR} = $3;
+         }
+     }