config.cmake: take APPEND_PROJECT_NAME_TO_INCLUDEDIR into account

Signed-off-by: Martin Valgur <martin.valgur@gmail.com>

Author: valgur

cmake/urdfdom-config.cmake.in

@@ -9,6 +9,9 @@ set(CMAKE_MODULE_PATH_BACKUP_URDFDOM ${CMAKE_MODULE_PATH})
 list(APPEND CMAKE_MODULE_PATH "${@PROJECT_NAME@_DIR}")
 
 set(@PKG_NAME@_INCLUDE_DIRS "@PACKAGE_CMAKE_INSTALL_INCLUDEDIR@")
+if(@APPEND_PROJECT_NAME_TO_INCLUDEDIR@)
+  list(APPEND @PKG_NAME@_INCLUDE_DIRS "@PACKAGE_CMAKE_INSTALL_INCLUDEDIR@/..")
+endif()
 
 foreach(lib @PKG_LIBRARIES@)
   set(onelib "${lib}-NOTFOUND")