[PATCH] mmap: fix bug introduced with the io engine split

We never initialized the mmap area, because it forgot
to get FIO_MMAPIO.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/engines/fio-engine-mmap.c b/engines/fio-engine-mmap.c
index ad294f5..0c79752 100644
--- a/engines/fio-engine-mmap.c
+++ b/engines/fio-engine-mmap.c
@@ -98,5 +98,5 @@
 	.event		= fio_mmapio_event,
 	.cleanup	= fio_mmapio_cleanup,
 	.sync		= fio_mmapio_sync,
-	.flags		= FIO_SYNCIO,
+	.flags		= FIO_SYNCIO | FIO_MMAPIO,
 };