message: gapi: fix opencv_world build
diff: @@ -19,6 +19,11 @@ set(the_description "OpenCV G-API Core Module")
  ocv_add_module(gapi opencv_imgproc)
  +if(MSVC)
  + # Disable obsollete warning C4503 popping up on MSVC <<2017
  + # https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4503?view=vs-2019
  + ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4503)
  +endif()
  file(GLOB gapi_ext_hdrs
  "${CMAKE_CURRENT_LIST_DIR}/include/opencv2/*.hpp"
  @@ -132,11 +137,5 @@ if(TARGET opencv_test_gapi)
  target_link_libraries(opencv_test_gapi PRIVATE ade)
  endif()
  -if(MSVC)
  - # Disable obsollete warning C4503 popping up on MSVC <<2017
  - # https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4503?view=vs-2019
  - set_target_properties(${the_module} PROPERTIES COMPILE_FLAGS "/wd4503")
  -endif()
  -
  ocv_add_perf_tests()
  ocv_add_samples()
  