message: Use URL instead of GIT_TAG in jsoncpp CMakeLists
diff: @@ -29,8 +29,7 @@ endforeach()
  ExternalProject_Add(
  jsoncpp
  - GIT_REPOSITORY https://github.com/open-source-parsers/jsoncpp
  - GIT_TAG 1.9.1
  + URL https://github.com/open-source-parsers/jsoncpp/archive/1.9.1.zip
  PREFIX jsonpp
  CMAKE_ARGS "${CMAKE_ARGS}"
  )
  