tools/memory-model: Do not use "herd" to refer to "herd7"

Use "herd7" in each such reference.

Signed-off-by: Andrea Parri <andrea.parri@amarulasolutions.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Jade Alglave <j.alglave@ucl.ac.uk>
Cc: Luc Maranget <luc.maranget@inria.fr>
Cc: "Paul E. McKenney" <paulmck@linux.ibm.com>
Cc: Akira Yokosawa <akiyks@gmail.com>
Cc: Daniel Lustig <dlustig@nvidia.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>

tools/memory-model/scripts/runlitmushist.sh

@@ -79,7 +79,7 @@ then
 	echo ' ---' Summary: 1>&2
 	grep '!!!' $T/*.sh.out 1>&2
 	nfail="`grep '!!!' $T/*.sh.out | wc -l`"
-	echo 'Number of failed herd runs (e.g., timeout): ' $nfail 1>&2
+	echo 'Number of failed herd7 runs (e.g., timeout): ' $nfail 1>&2
 	exit 1
 else
 	echo All runs completed successfully. 1>&2