fuse: Update to 2.9.4

Change-Id: I0877c624531286f47da29a7ab16c7ff3cfac0090
diff --git a/fuse/fuse_session.c b/fuse/fuse_session.c
index c55f250..18c8c42 100644
--- a/fuse/fuse_session.c
+++ b/fuse/fuse_session.c
@@ -182,6 +182,16 @@
 	return ch->fd;
 }
 
+int fuse_chan_clearfd(struct fuse_chan *ch)
+{
+	if (ch == NULL)
+		return -1;
+
+	int fd = ch->fd;
+	ch->fd = -1;
+	return fd;
+}
+
 size_t fuse_chan_bufsize(struct fuse_chan *ch)
 {
 	return ch->bufsize;