[odin bindings] Exclude 'NUM' enum values

[jakubtomsu]

There is no reason to have a NUM field at the end of an enum in Odin. Because unlike in C, Odin supports len(My_Enum). And the additional enum field also interferes with things like enumerated arrays and bit_sets.

[floooh]

Thanks! I'll try looking at your other PRs later today.

[jakubtomsu]

Thank you! The other PRs I've submitted were mostly things I ran into while working on my game. But I never got around to submitting them upstream, so I did that now all at once :)