Fix splash screens

[xovox]

This has been broken for a while now. Thankfully, I found a neat little tool & figured out how to use it! I'm so super clever! Look at me! Will any ever actually read this?!

this depends on the xml-twig-tools package

The following is really slow at 2 seconds on my straight 3B, but i can just cache the result so it'll be quick the next time.

xml_grep \
  --text_only \
  "/gameList/game[@id='mspacman']/image" \
  $HOME/RetroPie/roms/fba/gamelist.xml

[xovox]

pi@retropie:~/RetroPie/roms/fba $ time xml_grep --text_only "/gameList/game[@id='mspacman']/image" gamelist.xml 
/home/pi/RetroPie/media/arcade/image/mspacman-image.png

real    0m2.103s
user    0m2.023s
sys     0m0.071s