Address review comments

This splits the Linux workflow and build script into linux and linux-arm64.

dist/appimage/AppRun.wrapped.sh

@@ -37,7 +37,4 @@ if [ -n "$cxxpath" ] || [ -n "$gccpath" ]; then
   fi
 fi
 
-#echo ">>>>> $LD_LIBRARY_PATH"
-#echo ">>>>> $LD_PRELOAD"
-
 exec "$binary" "$@"

dist/appimage/package-appimage-arm64.sh

@@ -1,5 +1,9 @@
+# Prepare AppDir
 mv ./linux-arm64-appimage/AppDir.7z ./AppDir.7z
 7z x AppDir.7z
+mv ./AppDir/usr/local/* ./AppDir/usr
+rm -rf ./AppDir/usr/local
+sed -e s/PrefersNonDefaultGPU=true//g -i ./AppDir/usr/share/applications/citra-qt.desktop
 
 # Seperate AppDir for all Citra executables
 cp -r AppDir AppDir-qt