Add COMPLETE pragma to MAKE_VERSION

[sheaf]

Just had a build throw up the following warning:

src\Vulkan\Utils\Requirements.hs:619:9: warning: [-Wincomplete-uni-patterns]
    Pattern match(es) are non-exhaustive
    In a pattern binding:
        Patterns of type `Word32' not matched: GHC.Word.W32# _
    |
619 |   where MAKE_VERSION ma mi pa = ver
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^

I believe this would be solved with the addition of the pragma {-# COMPLETE MAKE_VERSION #-}.