message: Fix missing interface include from gtest
diff: @@ -2,3 +2,8 @@ set(BUILD_GTEST ON)
  set(BUILD_GMOCK OFF)
  add_subdirectory(googletest)
  +
  +# Fix missing usage requirements
  +target_include_directories(gtest
  + INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/googletest/googletest/include
  +)
  