Bless mir-opt for excluded alloc bytes

Author: cuviper

tests/mir-opt/const_debuginfo.main.SingleUseConsts.diff

@@ -119,11 +119,7 @@
       }
   }
 
-  ALLOC0 (size: 8, align: 4) {
-      20 00 00 00 20 00 00 00                         │  ... ...
-  }
+  ALLOC0 (size: 8, align: 4) { .. }
 
-  ALLOC1 (size: 4, align: 2) {
-      01 00 63 00                                     │ ..c.
-  }
+  ALLOC1 (size: 4, align: 2) { .. }
 

tests/mir-opt/const_prop/address_of_pair.fn0.GVN.diff

@@ -44,9 +44,7 @@
           StorageDead(_2);
           return;
       }
-+ }
-+ 
-+ ALLOC0 (size: 8, align: 4) {
-+     01 00 00 00 00 __ __ __                         │ .....░░░
   }
++ 
++ ALLOC0 (size: 8, align: 4) { .. }