jsoncpp: Exclude from include-what-you-use

This is third-party code.

Utilities/cmjsoncpp/CMakeLists.txt

@@ -24,3 +24,4 @@ include_directories(
 
 add_library(cmjsoncpp ${JSONCPP_SOURCES})
 target_link_libraries(cmjsoncpp ${CMake_KWIML_LIBRARIES})
+set_property(TARGET cmjsoncpp PROPERTY CXX_INCLUDE_WHAT_YOU_USE "")