Attempt to fix Travis

test/app/CMakeLists.txt

 add_library(module_api SHARED module_api.c)
 target_link_libraries(module_api -rdynamic)
 set_target_properties(module_api PROPERTIES PREFIX "")
-set_target_properties(module_api PROPERTIES INCLUDE_DIRECTORIES
-    "${CMAKE_BINARY_DIR}/src/trivia;${CMAKE_SOURCE_DIR}/third_party/luajit/src/")
 add_dependencies(module_api generate_module_api)
+target_include_directories(module_api PUBLIC ${CMAKE_BINARY_DIR}/src/trivia)