fix crypto library flags

metadata_hub.c

@@ -45,6 +45,18 @@
 #include "dacp.h"
 #include "metadata_hub.h"
 
+#ifdef CONFIG_MBEDTLS
+#include <mbedtls/md5.h>
+#endif
+
+#ifdef CONFIG_POLARSSL
+#include <polarssl/md5.h>
+#endif
+
+#ifdef CONFIG_OPENSSL
+#include <openssl/md5.h>
+#endif
+
 pthread_rwlock_t metadata_hub_re_lock = PTHREAD_RWLOCK_INITIALIZER;
 struct track_metadata_bundle *track_metadata; // used for a temporary track metadata store
 
@@ -207,7 +219,7 @@ char *metadata_write_image_file(const char *buf, int len) {
   uint8_t img_md5[16];
   // uint8_t ap_md5[16];
 
-#ifdef CONFIG_SSL
+#ifdef CONFIG_OPENSSL
   MD5_CTX ctx;
   MD5_Init(&ctx);
   MD5_Update(&ctx, buf, len);