perf stat: Fix multi-line metric output in JSON

When a metric produces more than one values, it missed to print the opening
bracket.

Fixes: ab6baaae27357290 ("perf stat: Fix JSON output in metric-only mode")
Reported-by: Weilin Wang <[email protected]>
Signed-off-by: Namhyung Kim <[email protected]>
Tested-by: Weilin Wang <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Athira Jajeev <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: James Clark <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Namhyung Kim <[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