perf test event_update: Fix memory leak of unit
ASan reports a memory leak while running: # perf test "49: Synthesize attr update" Caused by a string being duplicated but never freed. This patch adds the missing free(). Note that evsel->unit is not deallocated together with evsel since it is supposed to be a constant string. Signed-off-by: Riccardo Mancini <rickyman7@gmail.com> Fixes: a6e52817 ("perf tools: Add event_update event unit type") Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/1fbc8158663fb0d4d5392e36bae564f6ad60be3c.1626343282.git.rickyman7@gmail.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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