package/xvkbd: bump to version 4.0

- Update hash of README: lots of updates (year, changelog, ...)
- Drop patch and switch to autotools infrastructure to use the new
  configure script added in this release
- Add patch to fix install

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
4 files changed