Add buzzer test source code

guowenxue

2025-12-17 fe7aebb0fa469c98f4ac3bc52874738f84edb515

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all: update_cross
    @./build.sh
 
clean:
    @./build.sh -c
 
update_cross:
ifdef CROSS_COMPILE
    sed -i 's|^CROSS_COMPILE=.*|CROSS_COMPILE=${CROSS_COMPILE}|g' build.sh
endif