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

t/pt-table-checksum/samples/issue_122.sql

@@ -0,0 +1,15 @@
+USE test;
+DROP TABLE IF EXISTS issue_122;
+CREATE TABLE issue_122 (
+   id    INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+   a     CHAR(1)
+);
+
+DROP TABLE IF EXISTS argtable;
+CREATE TABLE argtable (
+   db    CHAR(64) NOT NULL,
+   tbl   CHAR(64) NOT NULL,
+   since CHAR(64),
+   PRIMARY KEY (db, tbl)
+);
+INSERT INTO test.argtable VALUES ('test','issue_122',NULL);