[PATCH libxkbcommon 0/4] Update makekeys to match libX11

[Ran Benita]

There should be no diff now between libxkbcommon and libX11 copies of
makekeys, other than some whitespace and the
typedef uint32_t Signature
part.
I tried to break it so as to be easier to review. Please apply after
the other patches, as I made some changes to makekeys there as well.

Ran

[PATCH libxkbcommon 1/4] makekeys: Fix build/target word size
[PATCH libxkbcommon 2/4] When makekeys fails to find a good hash,
[PATCH libxkbcommon 3/4] makekeys: Receive the keysym files as
[PATCH libxkbcommon 4/4] makekeys: update to match the rest of