perf tools: Fix ppid for synthesized fork events
perf tools: Fix ppid for synthesized fork events

363b785f38 added synthesized fork events and set a thread's parent id to
itself. Since we are already processing /proc/<pid>/status the ppid can
be determined properly. Make it so.

Signed-off-by: David Ahern <b80c1600f604d3b0d768f26f90a76757e76005dd@gmail.com>
Acked-by: Don Zickus <3c9a8cec2f33672bf03519b05ce2324e6cf5717a@redhat.com>
Acked-by: Jiri Olsa <2c6594f608aa3d41e98d48846a6328831f7084ad@kernel.org>
Cc: Joe Mario <74d622e4b717f97c95143ea294a486ac633019e9@redhat.com>
Link: http://lkml.kernel.org/r/1427747758-18510-2-git-send-email-b80c1600f604d3b0d768f26f90a76757e76005dd@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <293abb6b76d7791c0732cc517d38c4b5c734b87f@redhat.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs