ACPICA: Add utcksum.o to the acpidump Makefile

Commit 51aad1a6 ("ACPICA: Finish support for the CDAT table")
did not add utcksum.o to the acpidump Makefile by mistake.

Do that now.

Fixes: 51aad1a6

 ("ACPICA: Finish support for the CDAT table")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>