example: sysinfo: add timer pool start call

Call odp_timer_pool_start() before querying timer pool info. Depending on
the implementation, some information may only be available after the
timer pool has been started.

Also, print clock source in case of timer API call failures.

Signed-off-by: Matias Elo <matias.elo@nokia.com>
Reviewed-by: Petri Savolainen <petri.savolainen@nokia.com>

example/sysinfo/odp_sysinfo.c

@@ -556,7 +556,7 @@ static int timer_capability(appl_args_t *appl_args)
 		if (ret == -1)
 			continue;
 		if (ret < -1) {
-			ODPH_ERR("odp_timer_capability() failed: %d\n", ret);
+			ODPH_ERR("odp_timer_capability() for clock source %d failed: %d\n", i, ret);
 			return -1;
 		}
 
@@ -573,9 +573,11 @@ static int timer_capability(appl_args_t *appl_args)
 			return -1;
 		}
 
+		odp_timer_pool_start();
+
 		ret = odp_timer_pool_info(pool, info);
 		if (ret) {
-			ODPH_ERR("odp_timer_pool_info() failed: %d\n", ret);
+			ODPH_ERR("odp_timer_pool_info() for clock source %d failed: %d\n", i, ret);
 			return -1;
 		}