add a little note about submodules (#1)

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Francisco Demartino 2021-05-28 16:44:02 -03:00 committed by GitHub
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@ -18,7 +18,7 @@ SDL2. untested on Windows/macOS.
## compilation
your typical CMake project. clone and:
your typical CMake project. clone (including submodules) and:
```
mkdir build