doc: make building with ninja more discoverable
Building with ninja would speed up the build We have the documenation about building with ninja, but not easily discoverable. And present this early to the contributors.
cc: @RaisinTen
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Building with ninja would speed up the build We have the documenation about building with ninja, but not easily discoverable. And present this early to the contributors.
cc: @RaisinTen