task: Update reading of signal dump queue position

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
obj: Drop read_obj_cpt_cont helper

It's the same as read_obj_cont

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
task: Add conversion of pending signal queues

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
task: Convert thread private sigqueue

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
sig: Fix CR_FD_x typo

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
sig: Reuse write_signal_private_queue helper in write_signal_queues

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>