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

t/pt-table-sync/samples/issue_37.sql

@@ -0,0 +1,7 @@
+USE test;
+DROP TABLE IF EXISTS `issue_37`;
+CREATE TABLE `issue_37` (
+   a INT DEFAULT 0,
+   UNIQUE INDEX idx_a (a)
+);
+CREATE TRIGGER a_trig BEFORE INSERT ON issue_37 FOR EACH ROW SET @a = @a + NEW.a;