package/cdrkit: add patch to fix CMake 4.0 build issue

CMake 4.0 requires to have a cmake_minimum_required() in
CMakeLists.txt, which cdrkit doesn't have, so ths commit adds a patch
adding the missing statement. We have chosen version 3.18 because that
the oldest version that we expect is 3.18. From
package/cmake/Config.in.host:

  # The minimum system cmake version we expect if 3.18 as provided by
  # Debian bullseye, that we use in our reference build docker image.

The patch cannot be upstreamed, as cdrkit basically no longer has any
upstream.

Fixes:

  https://autobuild.buildroot.org/results/3412e47836b54928a55c12b46549d6307ab623e7/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

package/cdrkit/0005-CMakeLists.txt-add-cmake_minimum_required.patch

@@ -0,0 +1,25 @@
+From 055130476b2ae349ab00b5cc5958d02da2fc2983 Mon Sep 17 00:00:00 2001
+From: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
+Date: Fri, 16 May 2025 16:12:03 +0200
+Subject: [PATCH] CMakeLists.txt: add cmake_minimum_required()
+
+Using cmake_minimum_required() is now mandatory with CMake 4.0.
+
+Upstream: N/A, no clear upstream
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
+---
+ CMakeLists.txt | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 57edba6..70c6993 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -1,3 +1,4 @@
++cmake_minimum_required(VERSION 3.18)
+ PROJECT (cdrkit C)
+ SUBDIRS(include genisoimage wodim libedc libhfs_iso libparanoia icedax libusal librols libunls readom netscsid 3rd-party/dirsplit)
+ 
+-- 
+2.49.0
+