Camera2: Docs - Add output_file option to metadata_parser_xml.py

Change-Id: I5b7d991bc569c36e23a9567289e9c4dbd9759378
diff --git a/camera/docs/metadata-generate b/camera/docs/metadata-generate
index 38f8ac7..7869763 100755
--- a/camera/docs/metadata-generate
+++ b/camera/docs/metadata-generate
@@ -33,7 +33,7 @@
     local in=$thisdir/$1
     local out=$thisdir/$2
 
-    python $thisdir/metadata_parser_xml.py $thisdir/metadata_properties.xml $in > $out
+    python $thisdir/metadata_parser_xml.py $thisdir/metadata_properties.xml $in $out
 
     local succ=$?