Don't include timestamp in auto generated files

assets.sh

@@ -18,7 +18,7 @@ cd gui
 for f in $(find . -type f) ; do 
 	f="${f#./}"
 	echo "gr, _ = gzip.NewReader(bytes.NewBuffer([]byte{"
-	gzip -c $f | od -vt x1 | sed 's/^[0-9a-f]*//' | sed 's/\([0-9a-f][0-9a-f]\)/0x\1,/g'
+	gzip -n -c $f | od -vt x1 | sed 's/^[0-9a-f]*//' | sed 's/\([0-9a-f][0-9a-f]\)/0x\1,/g'
 	echo "}))"
 	echo "data, _ = ioutil.ReadAll(gr)"
 	echo "Assets[\"$f\"] = data"