Fix VIRGO command.

builder/stage4/16-pisdr-virgo/00-run.sh

@@ -5,6 +5,6 @@ mkdir -p    "/home/${FIRST_USER_NAME}/PiSDR/Software"
 cd 		    "/home/${FIRST_USER_NAME}/PiSDR/Software"
 
 if [ ! -d "VIRGO" ]; then
-    https://github.com/0xCoto/VIRGO
+    git clone https://github.com/0xCoto/VIRGO
 fi
 EOF