Xemu: add libglu1-mesa-dev

Should fix '/usr/bin/ld: cannot find -lGLU: No such file or directory'

scripts/games_and_emulators/xemu.sh

@@ -12,7 +12,7 @@ bionic)
 esac
 case "$__os_id" in
 Raspbian | Debian | Ubuntu)
-  sudo apt install -y build-essential libsdl2-dev libepoxy-dev libpixman-1-dev libgtk-3-dev libssl-dev libsamplerate0-dev libpcap-dev ninja-build python3 build-essential libaio-dev libslirp-dev || error "Could not install dependencies!"
+  sudo apt install -y build-essential libsdl2-dev libepoxy-dev libpixman-1-dev libgtk-3-dev libssl-dev libsamplerate0-dev libpcap-dev ninja-build python3 build-essential libaio-dev libslirp-dev libglu1-mesa-dev || error "Could not install dependencies!"
   #this script updates SDL2 for aarch64 devices and does nothing for others
   bash -c "$(curl -s https://raw.githubusercontent.com/$repository_username/L4T-Megascript/$repository_branch/scripts/sdl2_install_helper.sh)"
   ;;