perf stat: Add missing separator in the CSV header

It should have a comma after 'cpus' for socket and die aggregation mode.
The output of the following command shows the issue.

  $ sudo perf stat -a --per-socket -x, --metric-only -I1 true

Before:

                  +--- here
                  V
   time,socket,cpusGhz,insn per cycle,branch-misses of all branches,
       0.000908461,S0,8,0.950,1.65,1.21,

After:

   time,socket,cpus,GHz,insn per cycle,branch-misses of all branches,
       0.000683094,S0,8,0.593,2.00,0.60,

Signed-off-by: Namhyung Kim <[email protected]>
Acked-by: Ian Rogers <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: James Clark <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Xing Zhengjun <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

0 files changed, 0 insertions, 0 deletions