patch 8.1.1212: signal PWR is not tested

Problem:    Signal PWR is not tested.
Solution:   Test that PWR updates the swap file. (Dominique Pelle,
            closes #4312)

src/version.c

@@ -767,6 +767,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1212,
 /**/
     1211,
 /**/