aes: add test unit for aes128

This commit add test unit for aes128.

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/test/lib/Makefile b/test/lib/Makefile
index 72d2ec7..230068d 100644
--- a/test/lib/Makefile
+++ b/test/lib/Makefile
@@ -8,3 +8,4 @@
 obj-y += string.o
 obj-$(CONFIG_ERRNO_STR) += test_errno_str.o
 obj-$(CONFIG_UT_LIB_ASN1) += asn1.o
+obj-$(CONFIG_AES) += test_aes.o