nbd: sync API definitions with upstream

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
diff --git a/nbd.c b/nbd.c
index 47ecb22..d32a19e 100644
--- a/nbd.c
+++ b/nbd.c
@@ -67,6 +67,8 @@
 #define NBD_PRINT_DEBUG         _IO(0xab, 6)
 #define NBD_SET_SIZE_BLOCKS     _IO(0xab, 7)
 #define NBD_DISCONNECT          _IO(0xab, 8)
+#define NBD_SET_TIMEOUT         _IO(0xab, 9)
+#define NBD_SET_FLAGS           _IO(0xab, 10)
 
 #define NBD_OPT_EXPORT_NAME     (1 << 0)