package/libubootenv: fix cmake 4 compatibility

Add a patch fixing cmake 4 compatibility.

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

package/libubootenv/0002-Update-cmake_minimum_required-to-3.5.patch

@@ -0,0 +1,53 @@
+From 87581f45d442903af8a9f331b11052bdd836c7f6 Mon Sep 17 00:00:00 2001
+From: James Hilliard <james.hilliard1@gmail.com>
+Date: Wed, 14 May 2025 14:03:38 -0600
+Subject: [PATCH] Update cmake_minimum_required to 3.5
+
+This supports compilation with cmake-4.0.0.
+
+Fixes:
+CMake Error at CMakeLists.txt:5 (cmake_minimum_required):
+  Compatibility with CMake < 3.5 has been removed from CMake.
+
+  Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
+  to tell CMake that the project requires at least <min> but has been updated
+  to work with policies introduced by <max> or earlier.
+
+  Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.
+
+Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
+Upstream: https://patchwork.ozlabs.org/project/swupdate/patch/20250514201740.686772-1-james.hilliard1@gmail.com/
+---
+ CMakeLists.txt     | 2 +-
+ src/CMakeLists.txt | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 796d7bc..0a11730 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -2,7 +2,7 @@
+ #
+ # SPDX-License-Identifier:     LGPL-2.1-or-later
+ 
+-cmake_minimum_required (VERSION 2.6)
++cmake_minimum_required (VERSION 3.5)
+ project (libubootenv C)
+ 
+ # The version number.
+diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
+index c56d0c7..3370232 100644
+--- a/src/CMakeLists.txt
++++ b/src/CMakeLists.txt
+@@ -1,7 +1,7 @@
+ # SPDX-FileCopyrightText: 2019-2021 Stefano Babic <stefano.babic@swupdate.org>
+ #
+ # SPDX-License-Identifier:     LGPL-2.1-or-later
+-cmake_minimum_required (VERSION 2.6)
++cmake_minimum_required (VERSION 3.5)
+ # Sources and private headers
+ SET(libubootenv_SOURCES
+   uboot_env.c
+-- 
+2.34.1
+