Made AppImages way more robust, compatible and reproducible using containerization and by using system-provided glibc

AppImage-build-local.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+
+FILE=build/bin/yuzu
+if test -f "$FILE"; then
+    # remove any previously made AppImage in the base torzu git folder
+    rm ./torzu.AppImage
+
+    # enter AppImage utility folder
+    cd AppImageBuilder
+
+    # run the build script to create the AppImage
+    # (usage) ./build.sh [source torzu build folder] [destination .AppImage file]
+    ./build.sh ../build ./torzu.AppImage
+
+    FILE=./torzu.AppImage
+    if test -f "$FILE"; then
+       # move the AppImage to the main torzu folder
+       mv torzu.AppImage ..
+       # return to main torzu folder
+       cd ..
+       # show contents of current folder
+       echo
+       ls
+       # show AppImages specifically
+       echo
+       ls *.AppImage
+       echo
+       echo "'torzu.AppImage' is now located in the current folder."
+       echo
+    else
+       cd ..
+       echo "AppImage was not built."
+    fi
+else
+    echo
+    echo "$FILE does not exist."
+    echo
+    echo "No yuzu executable found in the /torzu/build/bin folder!"
+    echo
+    echo "You must first build a native linux version of torzu before running this script!"
+    echo
+fi