Patch CMakeLists.txt to fulfill cmake 4.0 requirements
of cmake_minimum_required being at least 3.5 and in future 3.10.
Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
Link: https://github.com/openwrt/openwrt/pull/20265
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
