RPi Latest development branch mysgw do not work with raspbian 64bit

[vlachoudis]

Recently I've re-installed the rasbian 64bit on a RPi v4, However the mysgw was unable to connect. When I've re-installed the 32bit version everything worked ok. Please note that a year ago I've installed the 64bit on a RPi v3, by simply altering the CFLAGS and removing the options

        -mfpu=neon-fp-armv8
        -mfloat-abi=hard

and it was working ok