Revert change to CMakeLists.txt which only works with 3.9+

string(TOUPPER "${CMAKE_BUILD_TYPE}" BTYPE)

get_directory_property(CPPFLAGS DIRECTORY ${CMAKE_SOURCE_DIR} COMPILE_DEFINITIONS)

include(FeatureSummary)

feature_summary(DEFAULT_DESCRIPTION WHAT PACKAGES_FOUND)

feature_summary(DESCRIPTION "The following packages have been found:" WHAT PACKAGES_FOUND)

message(STATUS "<<< Build configuration >>>

   Build type       ${CMAKE_BUILD_TYPE}

   Install path     ${CMAKE_INSTALL_PREFIX}