Incremental: make sure container name appears in /dev

We need to send a "change" event just like we do when
creating an array.

This reverts commit 382afe49b1

The problem is that we need udev to create the file in /dev
for us.
It might be unnecessary for udev to consider assembling things
in this array, but it shouldn't cause a problem.  If it did that
would be a different bug which we probably need locking to fix.

Or maybe udev shouldn't trigger a "-I" for containers appearing.

Signed-off-by: NeilBrown <neilb@suse.de>

Incremental.c

@@ -447,6 +447,7 @@ int Incremental(char *devname, int verbose, int runstop,
 	if (info.array.level == LEVEL_CONTAINER) {
 		int devnum = devnum; /* defined and used iff ->external */
 		/* Try to assemble within the container */
+		sysfs_uevent(sra, "change");
 		if (verbose >= 0)
 			fprintf(stderr, Name
 				": container %s now has %d devices\n",