youtube-dl: add Josef Schlehofer as co-maintainer

Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>

multimedia/youtube-dl/Makefile

@@ -18,7 +18,7 @@ PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION)
 
 PKG_LICENSE:=Unlicense
 PKG_LICENSE_FILES:=LICENSE
-PKG_MAINTAINER:=Adrian Panella <ianchi74@outlook.com>
+PKG_MAINTAINER:=Adrian Panella <ianchi74@outlook.com>, Josef Schlehofer <pepe.schlehofer@gmail.com>
 
 PKG_BUILD_DEPENDS:=python/host zip/host