xrCore: add missed include to CMakeLists.txt

Author: eagleivg

src/xrCore/CMakeLists.txt

@@ -16,7 +16,7 @@ list(APPEND DIRS
 
 add_dir("${DIRS}")
 
-include_directories(${CMAKE_CURRENT_SOURCE_DIR}/.. ${CMAKE_CURRENT_SOURCE_DIR}/../../sdk/include)
+include_directories(${CMAKE_CURRENT_SOURCE_DIR}/.. ${CMAKE_CURRENT_SOURCE_DIR}/../../Externals/pugixml/src ${CMAKE_CURRENT_SOURCE_DIR}/../../sdk/include)
 
 add_library(${PROJECT_NAME} SHARED ${${PROJECT_NAME}__SOURCES} ${${PROJECT_NAME}__INCLUDES})