CMakeLists.txt: we need CMake 3.2.0 to properly handle target_compile_features
CMakeLists.txt: we need CMake 3.2.0 to properly handle target_compile_features

BelledonneCommunications/flexisip,BelledonneCommunications/flexisip,BelledonneCommunications/flexisip,BelledonneCommunications/flexisip