update tsl2561.c to fix wiringpi bug

Guo Wenxue

2022-04-09 c3895785a268c067039ce30c0c77a8c2782c63fe

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INST_PATH=/usr/bin
 
BIN_FILES=dns
 
all: clean 
    gcc *.c -o ${BIN_FILES}
 
 
clean: 
    rm -f ${BIN_FILES}
 
install: 
    @cp ${BIN_FILES} ${INST_PATH}