libcgroup rebase

[Jan Safranek]

libcgroup-0.38.rc1 is heading to rawhide/F17. It should be binary
compatible with 0.37, no rebuild of your packages is needed. Please
check functionality of your applications, just to be sure.

Dependent packages:
condor
condor-procd
libvirt
policycoreutils-sandbox
policycoreutils-python

In addition, libcgroup is being moved to /usr and has native systemd
units. Check /usr/share/doc/libcgroup-tools-0.38.rc1/README_systemd for
instructions how to live with systemd.

It will be updated to final 0.38 release before F17 GA. I expect only
minor bugfixes, if any.

Jan