wrapper: cgroup_add_all_controllers(): fix variable typo

wrapper: cgroup_add_all_controllers(): fix variable typo

Coverity reported uninitialized value:

CID 313909 (#1 of 1): Uninitialized scalar variable (UNINIT)8.
uninit_use_in_call: Using uninitialized value *info.name as argument to
%s when calling fprintf.

In cgroup_add_all_controllers(), fix the wrong variable name in the
error message, while parsing the controller name.

Signed-off-by: Kamalesh Babulal <kamalesh.babulal@oracle.com>
Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>