youtube-dl: add dependencies

Signed-off-by: Adrian Panella <ianchi74@outlook.com>

multimedia/youtube-dl/Makefile

@@ -27,7 +27,7 @@ define Package/youtube-dl
   SECTION:=multimedia
   CATEGORY:=Multimedia
   TITLE:=utility to download videos from YouTube.com
-  DEPENDS:=+python-openssl
+  DEPENDS:=+python-openssl +python-email +python-xml +python-codecs +python-ctypes
   URL:=https://youtube-dl.org
 endef