Fixing ObjC runtime build error on Ubuntu 22.04 - "Compatibility with CMake < 3.5 has been removed from CMake."

Author: trunkmaster

Packaging/Sources/2_build_libobjc2.sh

@@ -46,6 +46,7 @@ cd ./.build
 
 $CMAKE_CMD .. \
 	-Dtsl-robin-map_DIR=${BUILD_ROOT}/robin-map-${ROBIN_MAP_VERSION} \
+	-DCMAKE_POLICY_VERSION_MINIMUM=3.5 \
 	-DCMAKE_C_COMPILER=${C_COMPILER} \
 	-DCMAKE_CXX_COMPILER=${CXX_COMPILER} \
 	-DGNUSTEP_INSTALL_TYPE=NONE \