[Qemu-block] [PATCH for-2.8] qapi: Document DEVICE_TRAY_MOVED addition

[Eric Blake]

Commit 2d76e72 failed to add a versioning tag to 'id'.

I audited all qapi*.json files from v2.7.0 to the current
state of the tree, and didn't find any other additions where
we failed to use a version tag.

Signed-off-by: Eric Blake <address@hidden>
---

Doc-only, so safe for 2.8. But we're also close enough to -rc3
that I'm fine if it has to go in later via -stable.

 qapi/block.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qapi/block.json b/qapi/block.json
index 937df05..8e9f590 100644
--- a/qapi/block.json
+++ b/qapi/block.json
@@ -199,7 +199,7 @@
 #          reasons, but it can be empty ("") if the image does not
 #          have a device name associated.
 #
-# @id: The name or QOM path of the guest device
+# @id: The name or QOM path of the guest device (since 2.8)
 #
 # @tray-open: true if the tray has been opened or false if it has been closed
 #
-- 
2.9.3