app/test-crypto-perf: fix memory leak

data is allocated but never freed.

Fixes: f8be1786b1 ("app/crypto-perf: introduce performance test application")
Cc: stable@dpdk.org

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>

app/test-crypto-perf/cperf_test_verify.c

@@ -386,6 +386,7 @@ cperf_verify_op(struct rte_crypto_op *op,
 					options->digest_sz);
 	}
 
+	rte_free(data);
 	return !!res;
 }