psa: Add psa_crypto_aead.[hc]

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/library/Makefile b/library/Makefile
index 13b0b29..f089e0b 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -120,6 +120,7 @@
 	     platform_util.o \
 	     poly1305.o \
 	     psa_crypto.o \
+	     psa_crypto_aead.o \
 	     psa_crypto_cipher.o \
 	     psa_crypto_client.o \
 	     psa_crypto_driver_wrappers.o \