perf evlist: Fix typo in deliver_sample()

This patch fixes a typo: s/delievery/delivery/

Signed-off-by: Soramichi Akiyama <akiyama@m.soramichi.jp>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170117222233.dfd92de0ad701e7c53396950@m.soramichi.jp
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/session.c

@@ -1191,7 +1191,7 @@ static int
 	u64 sample_type = evsel->attr.sample_type;
 	u64 read_format = evsel->attr.read_format;
 
-	/* Standard sample delievery. */
+	/* Standard sample delivery. */
 	if (!(sample_type & PERF_SAMPLE_READ))
 		return tool->sample(tool, event, sample, evsel, machine);