Fix mysql-test-run to work better with NDB

Fix broken string constant in mysqld.cc


mysql-test/mysql-test-run.sh:
  Don't enable NDB when the slave mysqld is started
  Remove the ndbcluster dir from var/ when restarting test
  Set datadir for NDB to @MYSQL_TEST_DIR/var so that ndbcluster dir is created there. Otherwise it will appear as a database in mysqld.
sql/mysqld.cc:
  The string was broken in two lines and failed to compile on some compiler.
  Remove ifdefs around OPT_NDBCLUSTER, it should always be available even when not supported.

mysql-test/mysql-test-run.sh

@@ -1040,7 +1040,7 @@ start_slave()
           --core --init-rpl-role=slave \
           --tmpdir=$MYSQL_TMP_DIR \
           --language=$LANGUAGE \
-          --skip-innodb --skip-slave-start \
+          --skip-innodb --skip-ndb --skip-slave-start \
           --slave-load-tmpdir=$SLAVE_LOAD_TMPDIR \
           --report-host=127.0.0.1 --report-user=root \
           --report-port=$slave_port \
@@ -1421,6 +1421,7 @@ then
   fi
 
   # Remove files that can cause problems
+  $RM -rf $MYSQL_TEST_DIR/var/ndbcluster
   $RM -f $MYSQL_TEST_DIR/var/run/* $MYSQL_TEST_DIR/var/tmp/*
 
   # Remove old berkeley db log files that can confuse the server
@@ -1436,7 +1437,7 @@ then
   if [ -z "$USE_RUNNING_NDBCLUSTER" ]
   then
     echo "Starting ndbcluster"
-    ./ndb/install_ndbcluster --initial --data-dir=$MASTER_MYDDIR || exit 1
+    ./ndb/install_ndbcluster --initial --data-dir=$MYSQL_TEST_DIR/var || exit 1
     export NDB_CONNECTSTRING=`cat Ndb.cfg`
   else
     export NDB_CONNECTSTRING="$USE_RUNNING_NDBCLUSTER"

sql/mysqld.cc

@@ -4162,13 +4162,10 @@ Disable with --skip-innodb (will save memory).",
 Disable with --skip-isam.",
    (gptr*) &opt_isam, (gptr*) &opt_isam, 0, GET_BOOL, NO_ARG, 1, 0, 0,
    0, 0, 0},
-#ifdef HAVE_NDBCLUSTER_DB
-  {"ndbcluster", OPT_NDBCLUSTER, "Enable NDB Cluster (if this version of MySQL
-supports it). \
+  {"ndbcluster", OPT_NDBCLUSTER, "Enable NDB Cluster (if this version of MySQL supports it). \
 Disable with --skip-ndbcluster (will save memory).",
    (gptr*) &opt_ndbcluster, (gptr*) &opt_ndbcluster, 0, GET_BOOL, NO_ARG, 1, 0, 0,
    0, 0, 0},
-#endif
   {"skip-locking", OPT_SKIP_LOCK,
    "Deprecated option, use --skip-external-locking instead.",
    0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},