Merge changes from topic "libprocessgroup_rc"

* changes:
  CgroupSetupCgroups -> CgroupSetup
  Add libcgrouprc to ld.config.*.txt.
  libprocessgroup: use libcgrouprc to read cgroup.rc
  libprocessgroup_setup: use libcgrouprc_format
  libprocessgroup: Move CgroupSetupCgroups() to libprocessgroup_setup
  libprocessgroup: Add libcgrouprc
  libprocessgroup: Add libcgrouprc_format