Fix ffi fixed sized integers.

[Kerilk]

After this patch, we should not have any :uintxx_t inside the generated ruby libraries, but :uintxx

Will need to fix babeltrace2 bindings as well

[TApplencourt]

Then the [Check same generated files] is broken, it should have changed something no -- and hence not passing?

[Kerilk]

Yeah maybe I fumbled the regexp, in the cab right now...

[TApplencourt]

Ah nice! Working as expected now

             :uint32�-_t�,\n',     '             :uint32,\n',    
             ```

[TApplencourt]

So before it was :uint32-_t and now it's uint32? Or I screw up the new / ref order

[Kerilk]

:unt32_t becomes :uint32
The - comes from the diff

[TApplencourt]

Ok perfect, so the diff look good.

[Kerilk]

If you could check there are no leftovers then we can merge