package/libxkbcommon: bump version to 1.0.3

package/libxkbcommon: bump version to 1.0.3

For details see [1], changelog:

- Fix (hopefully) a segfault in xkb_x11_keymap_new_from_device() in some
  unclear situation (bug introduced in 1.0.2).

- Fix keymaps created with xkb_x11_keymap_new_from_device() don't have level
  names (bug introduced in 0.8.0).

[1] https://lists.freedesktop.org/archives/wayland-devel/2020-November/041660.html

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>