perf hists: Free srcline when freeing hist_entry

We've been leaked srcline of hist_entry, it should be freed also.
Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
Reviewed-by: NJiri Olsa <jolsa@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1378876173-13363-4-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/hist.c

@@ -535,6 +535,7 @@ void hist_entry__free(struct hist_entry *he)
 {
 	free(he->branch_info);
 	free(he->mem_info);
+	free(he->srcline);
 	free(he);
 }