patch 8.1.0516: :move command marks buffer modified when nothing changed

Problem:    :move command marks buffer modified when nothing changed.
Solution:   Do not set 'modified'.  Add a test. (Jason Franklin)
diff --git a/src/Make_all.mak b/src/Make_all.mak
index f5f0552..da3a62c 100644
--- a/src/Make_all.mak
+++ b/src/Make_all.mak
@@ -123,6 +123,7 @@
 	test_mksession \
 	test_mksession_utf8 \
 	test_modeline \
+	test_move \
 	test_nested_function \
 	test_netbeans \
 	test_normal \