Don't use build dir build interfaces

Do not export a location in the build directory as a build interface.
This location is not created until the build step is run and can
interfere with the CMake configuration step if including in another
project.

src/lib_json/CMakeLists.txt

@@ -132,7 +132,6 @@ if(BUILD_SHARED_LIBS)
     target_include_directories(${SHARED_LIB} PUBLIC
         $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
         $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/${JSONCPP_INCLUDE_DIR}>
-        $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/include/json>
     )
 
     list(APPEND CMAKE_TARGETS ${SHARED_LIB})
@@ -166,7 +165,6 @@ if(BUILD_STATIC_LIBS)
     target_include_directories(${STATIC_LIB} PUBLIC
         $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
         $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/${JSONCPP_INCLUDE_DIR}>
-        $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/include/json>
     )
 
     list(APPEND CMAKE_TARGETS ${STATIC_LIB})
@@ -193,7 +191,6 @@ if(BUILD_OBJECT_LIBS)
     target_include_directories(${OBJECT_LIB} PUBLIC
         $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
         $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/${JSONCPP_INCLUDE_DIR}>
-        $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/include/json>
     )
 
     list(APPEND CMAKE_TARGETS ${OBJECT_LIB})