cmake LWS_HAVE_STRERROR examples

warmcat/libwebsockets CMakeLists.txt :649 

CHECK_FUNCTION_EXISTS(strerror LWS_HAVE_STRERROR)

c-jimenez/open-ocpp 3rdparty/libwebsockets/CMakeLists.txt :573 

CHECK_FUNCTION_EXISTS(strerror LWS_HAVE_STRERROR)

fluffos/fluffos src/thirdparty/libwebsockets/CMakeLists.txt :556 

CHECK_FUNCTION_EXISTS(strerror LWS_HAVE_STRERROR)