Updated xkbcomp to 1.4.0.

This xkbcomp release mostly contains a couple of bugfixes and parser
improvements. Notably, ignoring keycodes that X11 can never support
means that we can start using those keycodes, which xkbcommon
supports.

Benno Schulenberg (1):
      When overriding a key, adjust also its number of levels (#57242).

Daniel Stone (2):
      keycodes: Ignore high keycodes
      xkbcomp 1.4.0

Emil Velikov (1):
      autogen.sh: use quoted string variables

Mihail Konev (1):
      autogen: add default patch prefix

Peter Hutterer (1):
      autogen.sh: use exec instead of waiting for configure to finish

Ran Benita (1):
      When a file contains several maps, look for a default map

(wiz)