[tools] Add remote option to qemu.sh

I discovered that QEMU has a "remote" option to the `-vnc` switch, which
causes it to reverse-connect to a VNC client on start. I've added this
into qemu.sh as the -r option.

qemu.sh

@@ -33,6 +33,13 @@ while true; do
             vga=""
             shift
             ;;
+        -r | --remote)
+            shift
+            vnchost="${1:-${VNCHOST:-localhost}}"
+            gfx="-vnc ${vnchost}:7000,reverse"
+            vga=""
+            shift
+            ;;
         -k | --kvm)
             kvm="-enable-kvm"
             cpu="host"
@@ -92,6 +99,7 @@ qemu-system-x86_64 \
     -cpu "${cpu}" \
     -M q35 \
     -no-reboot \
+    -name "jsix" \
     $isaexit $log $gfx $vga $kvm $debug
 
 ((result = ($? >> 1) - 1))