[PATCH 2/4] like for cpustat, introduce the "gtime" (guest time of the task) and
"cgtime" (guest time of the task children) fields for the
tasks. Modify signal_struct and task_struct. Modify /proc/<pid>/stat to display
these new fields.

Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net>
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          "Software is hard" - Donald Knuth