cmake HAVE_FREE examples

SmartThingsCommunity/st-device-sdk-c test/framework/cmocka/ConfigureChecks.cmake :77 

check_function_exists(free HAVE_FREE)

clibs/cmocka ConfigureChecks.cmake :80 

check_function_exists(free HAVE_FREE)

in-formant/in-formant external/libsamplerate/CMakeLists.txt :104 

check_function_exists(free HAVE_FREE)