end processing options on zip cmd

Avoids name with dashes becoming options, i.e.

    $ tree .
    .
    ├── -a
    └── a

    0 directories, 2 files

    $ zip -rq a.zip *

    zip error: Invalid command arguments (short option 'a' not supported)

    $ zip -rq a.zip -- *

    $ ls
    -a  a  a.zip

Change-Id: I3992026c75c280d24d7641d2cef4c5cf7ad70c2f
Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
diff --git a/juno_utils.sh b/juno_utils.sh
index 548cedb..ba24e9c 100644
--- a/juno_utils.sh
+++ b/juno_utils.sh
@@ -81,7 +81,7 @@
 		find "$zip_dir" -name images.txt -exec cp -f "$image_txt" {} \;
 	fi
 
-	(cd "$zip_dir" && zip -rq "$zip_file" *)
+	(cd "$zip_dir" && zip -rq "$zip_file" -- *)
 	archive_file "$zip_file"
 }