trivial: snap: Cache the correct giomodules

Fixes:
'g_io_module_load': /usr/lib/x86_64-linux-gnu/gio/modules/libgiognutls.so: undefined symbol: g_io_module_load
Failed to load module: /usr/lib/x86_64-linux-gnu/gio/modules/libgiognutls.so
'g_io_module_load': /usr/lib/x86_64-linux-gnu/gio/modules/libgiolibproxy.so: undefined symbol: g_io_module_load
Failed to load module: /usr/lib/x86_64-linux-gnu/gio/modules/libgiolibproxy.so
'g_io_module_load': /usr/lib/x86_64-linux-gnu/gio/modules/libgiognomeproxy.so: undefined symbol: g_io_module_load
Failed to load module: /usr/lib/x86_64-linux-gnu/gio/modules/libgiognomeproxy.so

contrib/snap/fwupdtool.wrapper

@@ -1,8 +1,43 @@
 #!/bin/sh
 
+export XDG_CACHE_HOME=$SNAP_USER_COMMON/.cache
+mkdir -p $XDG_CACHE_HOME
+export GIO_MODULE_DIR=$XDG_CACHE_HOME/gio-modules
+
+# don't update between versions, we want to preserve previous data
 [ ! -d "$SNAP_USER_DATA/etc" ] && cp -R "$SNAP/etc" "$SNAP_USER_DATA"
 [ ! -d "$SNAP_USER_DATA/var" ] && cp -R "$SNAP/var" "$SNAP_USER_DATA"
+
+#determine architecture
+if [ "$SNAP_ARCH" = "amd64" ]; then
+  ARCH="x86_64-linux-gnu"
+elif [ "$SNAP_ARCH" = "armhf" ]; then
+  ARCH="arm-linux-gnueabihf"
+elif [ "$SNAP_ARCH" = "arm64" ]; then
+  ARCH="aarch64-linux-gnu"
+else
+  ARCH="$SNAP_ARCH-linux-gnu"
+fi
+
+# re-generate gio modules in local cache
+needs_update=true
+if [ -f $SNAP_USER_DATA/.last_revision ]; then
+  . $SNAP_USER_DATA/.last_revision 2>/dev/null
+fi
+if [ "$SNAP_DESKTOP_LAST_REVISION" = "$SNAP_REVISION" ]; then
+  needs_update=false
+fi
+if [ $needs_update = true ]; then
+  if [ -f $SNAP/usr/lib/$ARCH/glib-2.0/gio-querymodules ]; then
+    rm -rf $GIO_MODULE_DIR
+    mkdir -p $GIO_MODULE_DIR
+    ln -s $SNAP/usr/lib/$ARCH/gio/modules/*.so $GIO_MODULE_DIR
+    $SNAP/usr/lib/$ARCH/glib-2.0/gio-querymodules $GIO_MODULE_DIR
+  fi
+  echo "SNAP_DESKTOP_LAST_REVISION=$SNAP_REVISION" > $SNAP_USER_DATA/.last_revision
+fi
+
 export PATH="$SNAP/usr/sbin:$SNAP/usr/bin:$SNAP/sbin:$SNAP/bin:$PATH"
-export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$SNAP/lib:$SNAP/usr/lib:$SNAP/lib/x86_64-linux-gnu:$SNAP/usr/lib/x86_64-linux-gnu"
+export LD_LIBRARY_PATH="$SNAP/lib:$SNAP/usr/lib:$SNAP/lib/$ARCH:$SNAP/usr/lib/$ARCH"
 export LD_LIBRARY_PATH=$SNAP_LIBRARY_PATH:$LD_LIBRARY_PATH
 exec "$SNAP/usr/lib/fwupd/fwupdtool" "$@"