"autoreply" flag: autogenerate standard xxx_reply_t messages

Change-Id: I72298aaae7d172082ece3a8edea4217c11b28d79
Signed-off-by: Dave Barach <dave@barachs.net>
diff --git a/src/tools/vppapigen/node.h b/src/tools/vppapigen/node.h
index 297d603..65bd5d1 100644
--- a/src/tools/vppapigen/node.h
+++ b/src/tools/vppapigen/node.h
@@ -53,6 +53,7 @@
     NODE_MANUAL_PRINT,
     NODE_MANUAL_ENDIAN,
     NODE_DONT_TRACE,
+    NODE_AUTOREPLY,
 };
 
 enum passid {
@@ -84,6 +85,7 @@
 #define NODE_FLAG_MANUAL_ENDIAN (1<<1)
 #define NODE_FLAG_TYPEONLY (1<<3)
 #define NODE_FLAG_DONT_TRACE (1<<4)
+#define NODE_FLAG_AUTOREPLY (1<<5)
 
 typedef struct node_vft_ {
     void (*print)(struct node_ *);