Add a brief sanity check to loadup process (#314)

Each step of the loadup now starts with a 'touch' to create a timestamp. At the end of the loadup, it makes sure the files needed by the next step are newer. This will catch some of the problems.

scripts/loadup-lisp-from-mid.sh

@@ -7,12 +7,19 @@ if [ ! -f run-medley ] ; then
     exit 1
 fi
 
+touch tmp/loadup.timestamp
+
 scr="-sc 1024x768 -g 1042x790"
 
 
 ./run-medley $scr -greet $MEDLEYDIR/sources/LOADUP-LISP.CM tmp/init-mid.sysout
 
-echo ----- created: -------
-ls -l tmp/lisp.*[te]
-echo ----------------------
-
+if [ tmp/lisp.sysout -nt tmp/loadup.timestamp ]; then
+    
+    echo ---- made ----
+    ls -l tmp/lisp.*
+    echo --------------
+else
+    echo XXXXX FAILURE XXXXX
+    exit 1
+fi