perf test parse-metric: Ensure aggregate counts appear to have run

Commit bb5a920b90991279 ("perf stat: Ensure metrics are displayed even
with failed events") with failed events") made it so that counters which
weren't enabled in the kernel were handled as NaN in metrics.

This caused the "Parse and process metrics" test to start failing as it
wasn't putting a non-zero value in these variables.

Add arbitrary values of 1 to fix the test.

Fixes: bb5a920b90991279 ("perf stat: Ensure metrics are displayed even with failed events")
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Chun-Tse Shao <ctshao@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>