cmake: fix warning about policy CMP0145

Keep the DART compatibility enabled until test are moved
to CTest.
Signed-off-by: Clément Péron <peron.clem@gmail.com>

build-cmake/CMakeLists.txt

@@ -8,6 +8,10 @@ CMAKE_MINIMUM_REQUIRED(VERSION 3.10 FATAL_ERROR)
 cmake_policy(SET CMP0074 NEW)
 cmake_policy(SET CMP0091 NEW)
 cmake_policy(SET CMP0112 NEW)
+# TODO: Convert DART to CTEST
+if(POLICY CMP0145)
+  cmake_policy(SET CMP0145 OLD)
+endif()
 
 PROJECT(protobuf-c C CXX)