update led.c and relay.c

guowenxue

2021-11-03 b6a72028f0880a9e1d98502c15b7ceeaaf8042ce

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all:
    sed -i -e "s|^CROSSTOOL=.*|CROSSTOOL=${CROSSTOOL}|g" build.sh
    @bash build.sh
 
distclean: 
    @bash build.sh clean