amulet tiles

Replace the octagonal amulet placeholder for the two new tiles.
Give the "cubical amulet" a hint of being cube shaped and rename
"pentagonal amulet" to "perforated amulet" because it's easier to
draw that way.

Bump EDITLEVEL now for the extra objects and monsters because I
forgot to do so earlier.

win/share/objects.txt

@@ -3618,7 +3618,7 @@ Z = (195, 195, 195)
   .......KKKAA....
   ........AAA.....
 }
-# tile 189 (pentagonal / amulet of guarding)
+# tile 189 (perforated / amulet of guarding)
 {
   ................
   ......LLLLLAA...
@@ -3631,12 +3631,13 @@ Z = (195, 195, 195)
   ......LAA.LAA...
   ......ACCCAA....
   ......CKKKKAA...
-  .....CKKKKKKA...
-  .....CKKKKKKA...
-  ......KKKKKAA...
+  .....CKAKAKKA...
+  .....CKKAKAKA...
+  ......KAKAKAA...
   .......KKKAA....
   ........AAA.....
 }
+
 # tile 190 (cubical / amulet of flying)
 {
   ................
@@ -3648,13 +3649,13 @@ Z = (195, 195, 195)
   ....LAA.....LAA.
   .....LAA...LAA..
   ......LAA.LAA...
-  ......ACCCAA....
-  ......CKKKKAA...
-  .....CKKKKKKA...
-  .....CKKKKKKA...
-  ......KKKKKAA...
-  .......KKKAA....
-  ........AAA.....
+  .......LAL......
+  .....KKLKL......
+  .....KCCCCCA....
+  .....KCKKKKA....
+  .....KCKKKKA....
+  ......CKKKKA....
+  .......AAAAA....
 }
 # tile 191 (Amulet of Yendor / cheap plastic imitation of the Amulet of Yendor)
 {