stat: add dropped ios to the standard output

Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/server.c b/server.c
index fa029ca..33c512c 100644
--- a/server.c
+++ b/server.c
@@ -1066,6 +1066,7 @@
 	for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 		p.ts.total_io_u[i]	= cpu_to_le64(ts->total_io_u[i]);
 		p.ts.short_io_u[i]	= cpu_to_le64(ts->short_io_u[i]);
+		p.ts.drop_io_u[i]	= cpu_to_le64(ts->drop_io_u[i]);
 	}
 
 	p.ts.total_submit	= cpu_to_le64(ts->total_submit);