add app_ddns program

guowenxue

2020-01-01 7ac2c9846be1f8c82dacf17cf36551c5ccaf278a

 ch7_library/test/makefile

@@ -16,5 +16,3 @@
run:
   export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:LIBPATH
   ./${APPNAME}