net: run.sh: tweak quit logic

In some cases, the shell doesn't wait for the read to complete and just
keeps on printing "q Enter to close" in an infinite loop, making it
impossible to read the logs above. This happens with all terminals. I'm
not sure about the exact cause, work around it by only printing the
message once and sleeping inside the while true loop.

Change-Id: Iebb799493f76fd57f24b15c998ded2bd8e284e6b

net/templates/run.sh

@@ -120,12 +120,14 @@ wait
 
 echo
 
+echo '---'
+echo 'q Enter / ^C to close'
 while true; do
-  echo 'q Enter to close'
   read q_to_close
   if [ "x\$q_to_close" = xq ]; then
     break
   fi
+  sleep 0.1
 done
 EOF
   chmod +x "$wrapper"