Add forked Maatkit tools in bin/ and their tests in t/.

t/pt-index-usage/option_sanity.t

@@ -0,0 +1,30 @@
+#!/usr/bin/env perl
+
+BEGIN {
+   die "The PERCONA_TOOLKIT_BRANCH environment variable is not set.\n"
+      unless $ENV{PERCONA_TOOLKIT_BRANCH} && -d $ENV{PERCONA_TOOLKIT_BRANCH};
+   unshift @INC, "$ENV{PERCONA_TOOLKIT_BRANCH}/lib";
+};
+
+use strict;
+use warnings FATAL => 'all';
+use English qw(-no_match_vars);
+use Test::More tests => 1;
+
+use MaatkitTest;
+
+my $cnf = '/tmp/12345/my.sandbox.cnf';
+my $cmd = "$trunk/bin/pt-index-usage";
+my $output;
+
+$output = `$cmd --save-results-database h=127.1,P=12345 2>&1`;
+like(
+   $output,
+   qr/specify a D/,
+   "--save-results-database requires D part"
+);
+
+# #############################################################################
+# Done.
+# #############################################################################
+exit;