compare_results.sh: less drastic wording

We don't currently fail test runs from mismatching results, it's just for human
convenience. So don't say things like "Failing due to skipped tests", it's
confusing.

Summarize once the need to update results instead.

Change-Id: Ibafa75bd54df07253780c6af3a68a0a4d148e64b

compare-results.sh

@@ -152,6 +152,8 @@ done <<< "$(grep "<testcase" "$results_file")"
 echo "--------------------"
 overall_verdict=0
 
+ask_update=""
+
 if [ "x$pass" != x0 ]; then
   echo "$pass pass"
 fi
@@ -162,25 +164,25 @@ fi
 
 if [ "x$skipped" != x0 ]; then
   echo "$skipped skipped"
+  ask_update="$ask_update removed=$skipped"
   if [ "x$allow_skip" = x0 ]; then
     overall_verdict=4
-    echo "   Failing due to skipped tests. If tests were removed, update the expected results!"
   fi
 fi
 
 if [ "x$new" != x0 ]; then
   echo "$new new"
+  ask_update="$ask_update new=$new"
   if [ "x$allow_new" = x0 ]; then
     overall_verdict=3
-    echo "   Failing due to new tests. Update the expected results!"
   fi
 fi
 
 if [ "x$more_successes" != x0 ]; then
   echo "$more_successes pass unexpectedly"
+  ask_update="$ask_update xpass=$more_successes"
   if [ "x$allow_xpass" = x0 ]; then
     overall_verdict=2
-    echo "   Update the expected results!"
   fi
 fi
 
@@ -189,10 +191,9 @@ if [ "x$more_failures" != x0 ]; then
   overall_verdict=1
 fi
 
-echo
-if [ "x$overall_verdict" != x0 ]; then
-  echo "FAILURE"
-else
-  echo "ok"
+if [ -n "$ask_update" ]; then
+  echo
+  echo "(Please update the expected results:$ask_update)"
 fi
+
 exit $overall_verdict