Defaults: Enable wolfssl as the default libssl

Upstream has moved to using wolfssl as the default libssl.
This also fixes a bug where ssl support is missing in core images
in v1.5.3).

include/target.mk

@@ -13,7 +13,7 @@ __target_inc=1
 DEVICE_TYPE?=router
 
 # Default packages - the really basic set
-DEFAULT_PACKAGES:=base-files ca-bundle libc libgcc busybox dropbear mtd uci opkg netifd fstools uclient-fetch logd urandom-seed urngd
+DEFAULT_PACKAGES:=base-files ca-bundle libc libgcc libustream-wolfssl busybox dropbear mtd uci opkg netifd fstools uclient-fetch logd urandom-seed urngd
 # For nas targets
 DEFAULT_PACKAGES.nas:=block-mount fdisk lsblk mdadm
 # For router targets