Kill off the old 'tests' stuff. Write a ton of new tests for the

'testsuite' dir.  Fix a bunch of broken tests.  Fix the testsuite
'runtest' script so it actually reports all failures and provides
meaningful feedback.
 -Erik

testsuite/cmp/cmp-detects-difference

@@ -1,3 +1,9 @@
 echo foo >foo
 echo bar >bar
-! busybox cmp -s foo bar
+set +e
+busybox cmp -s foo bar
+if [ $? != 0 ] ; then
+	exit 0;
+fi
+
+exit 1;