Update libcmpiutil to 0.5.6, which includes build fixes only and
hardly qualifies for a release. But I'm updating the virt CIM
stack in SLE11SP2 to latest releases so wanted to push this
update to the package's devel project.

BTW, I forgot that libcmpiutil and libvirt-cim were maintained
in this project. I've recently sumbitted them to SP2 via
IBS project Devel:Virt:SLE-11-SP2. I'll need to reconcile some
differences with the systemsmanagement:wbem packages.

- Update to 0.5.6
* build cleanups (Eduardo Lima)