standard-gamepad.svg is not installed

Originally reported at https://bugs.debian.org/909359

• GNOME Games 3.30.0
• Debian Testing or Ubuntu 18.10

1. Open Preferences
2. Open Controllers > Keyboard

This error message shows up (and lots of out of memory warnings):

(org.gnome.Games:16498): Games-CRITICAL **: 14:36:33.908:
keyboard-mapper.vala:27: Could not set up gamepad view: Error opening
file
/home/pammann/resource:/org/gnome/Games/gamepads/standard-gamepad.svg/file:/home/pammann/resource:/org/gnome/Games/gamepads/standard-gamepad.svg:
No such file or directory