opkg-build: make sure destination dir exists

Signed-off-by: Christian Hermann <mail@hermannch.dev>
Signed-off-by: Alex Stewart <alex.stewart@ni.com>

opkg-build

@@ -263,6 +263,8 @@ case $# in
 	dest_dir=$2
 	if [ "$dest_dir" = "." -o "$dest_dir" = "./" ] ; then
 	    dest_dir=$PWD
+	else
+		mkdir -p "$dest_dir"
 	fi
 	;;
 *)