Adapt UAccCOM to X64 platform

Change-Id: I1fe8bea6c9463314ca0ea18615a48bac28cdda8f
Reviewed-on: https://gerrit.libreoffice.org/13227
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>