add cJSON, update mosquitto to 1.6.3 and update the makefile

Guo Wenxue

2019-06-24 809c78de808ed5563e9af4a56227965974ec25fa

 mqttd/hal/makefile

@@ -1,11 +1,13 @@

PWD=$(shell pwd )
LIBNAME=$(shell basename ${PWD} )

all: clean
   ${CROSS_COMPILE}gcc -c *.c 
   @rm -f *.o
   @${CROSS_COMPILE}gcc -c *.c 
   ${CROSS_COMPILE}ar -rcs  lib${LIBNAME}.a *.o

clean:
   @rm -f *.o 
   @rm -f *.o
   @rm -f *.a