Update icns_generator.sh newline

dist/icns_generator.sh

@@ -11,4 +11,4 @@ convert  -background none -resize 512x512 suyu.svg suyu.iconset/icon_512x512.png
 convert  -background none -resize 1024x1024 suyu.svg suyu.iconset/icon_512x512@2x.png;
 
 iconutil -c icns suyu.iconset
-rm -rf suyu.iconset
+rm -rf suyu.iconset