attempt to fix arm builds

This commit also updates the linux build script to *not* use --appimage-extract-and-run, so that it will try to use fusemount, if possible, instead of just resorting straight to the fallback that requires (insecurely) downloading a runtime, which will fail due to our safeguard using iptables

 * #40 (comment)

Author: maltfield

build/linux/buildAppImage.sh

@@ -468,7 +468,7 @@ mkdir -p "dist/${ARCHIVE_DIR}"
 
 # create the AppImage from kivy AppDir
 chmod +x ${source_appimagetool_path}
-${source_appimagetool_path} --appimage-extract-and-run --no-appstream "/tmp/kivy_appdir" "dist/${ARCHIVE_DIR}/${APP_NAME}-${VERSION}.AppImage"
+${source_appimagetool_path} --no-appstream "/tmp/kivy_appdir" "dist/${ARCHIVE_DIR}/${APP_NAME}-${VERSION}.AppImage"
 sha256sum "dist/${ARCHIVE_DIR}/${APP_NAME}-${VERSION}.AppImage"
 
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