WIP: add disk mode to emulate.sh

reform2-imx8mq/emulate.sh

@@ -1,5 +1,13 @@
 #!/bin/bash
 
+DISK=""
+if [ -e /dev/loop0p1 ]
+then
+	DISK="-drive if=none,file=/dev/loop0p1,id=rfs -device virtio-blk-device,drive=rfs"
+else
+	echo "Hint: mount the disk image with: udisksctl loop-setup -f ./reform-system.img"
+fi
+
 qemu-system-aarch64 \
   -machine virt \
   -cpu cortex-a53 \
@@ -11,8 +19,7 @@ qemu-system-aarch64 \
   -nic user,model=virtio-net-pci \
   -display gtk,gl=on \
   -device usb-ehci -device usb-kbd -device usb-tablet -usb \
-  -serial stdio
+  -serial stdio \
+  $DISK
 
-# optional: rootfs mounted from .img
-#-drive if=none,file=/dev/loop0p1,id=rfs -device virtio-blk-device,drive=rfs \