io_destroy01: TCONF when unsupported

to fix test on kernel built without CONFIG_AIO=y.

Reviewed-by: Cyril Hrubis <chrubis@suse.cz>
Signed-off-by: Petr Vorel <pvorel@suse.cz>
diff --git a/testcases/kernel/syscalls/io_destroy/io_destroy01.c b/testcases/kernel/syscalls/io_destroy/io_destroy01.c
index 560d7b3..43f92ad 100644
--- a/testcases/kernel/syscalls/io_destroy/io_destroy01.c
+++ b/testcases/kernel/syscalls/io_destroy/io_destroy01.c
@@ -32,6 +32,11 @@
 		return;
 	}
 
+	if (TST_RET == -ENOSYS) {
+		tst_res(TCONF, "io_destroy() not supported");
+		return;
+	}
+
 	if (TST_RET == -EINVAL) {
 		tst_res(TPASS,
 			"io_destroy() failed as expected, returned -EINVAL");