package/libxcrypt: fix build with perl >= 5.38

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

Fixes:
- http://autobuild.buildroot.net/results/04c/04cf8d79fe8a58c3438e7be95ae781c9b2bef8a0/

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

package/libxcrypt/0001-Make-BuildCommon.pm-compatible-with-latest-perl.patch

@@ -0,0 +1,50 @@
+From ce562f4d33dc090fcd8f6ea1af3ba32cdc2b3c9c Mon Sep 17 00:00:00 2001
+From: Leon Timmermans <fawaka@gmail.com>
+Date: Tue, 6 Jun 2023 17:03:57 +0200
+Subject: [PATCH] Make BuildCommon.pm compatible with latest perl
+
+It was previously using an experimental feature that has since been dropped.
+This removes the use of that feature.
+
+Upstream: https://github.com/besser82/libxcrypt/commit/ce562f4d33dc090fcd8f6ea1af3ba32cdc2b3c9c
+Signed-off-by: Daniel Lang <dalang@gmx.at>
+---
+ build-aux/scripts/BuildCommon.pm | 9 ++++-----
+ 1 file changed, 4 insertions(+), 5 deletions(-)
+
+diff --git a/build-aux/scripts/BuildCommon.pm b/build-aux/scripts/BuildCommon.pm
+index 0e6f2a31..c38ba21b 100644
+--- a/build-aux/scripts/BuildCommon.pm
++++ b/build-aux/scripts/BuildCommon.pm
+@@ -11,7 +11,6 @@ use v5.14;    # implicit use strict, use feature ':5.14'
+ use warnings FATAL => 'all';
+ use utf8;
+ use open qw(:utf8);
+-no  if $] >= 5.018, warnings => 'experimental::smartmatch';
+ no  if $] >= 5.022, warnings => 'experimental::re_strict';
+ use if $] >= 5.022, re       => 'strict';
+
+@@ -519,19 +518,19 @@ sub parse_symver_args {
+     my $COMPAT_ABI;
+     local $_;
+     for (@args) {
+-        when (/^SYMVER_MIN=(.+)$/) {
++        if (/^SYMVER_MIN=(.+)$/) {
+             $usage_error->() if defined $SYMVER_MIN;
+             $SYMVER_MIN = $1;
+         }
+-        when (/^SYMVER_FLOOR=(.+)$/) {
++        elsif (/^SYMVER_FLOOR=(.+)$/) {
+             $usage_error->() if defined $SYMVER_FLOOR;
+             $SYMVER_FLOOR = $1;
+         }
+-        when (/^COMPAT_ABI=(.+)$/) {
++        elsif (/^COMPAT_ABI=(.+)$/) {
+             $usage_error->() if defined $COMPAT_ABI;
+             $COMPAT_ABI = $1;
+         }
+-        default {
++        else {
+             $usage_error->() if defined $map_in;
+             $map_in = $_;
+         }