make output bitwidth-independent

Author: RalfJung

tests/fail/transmute_fat1.rs

@@ -1,4 +1,5 @@
 // error-pattern: type validation failed: encountered a pointer
+// normalize-stderr-test: "\[u8; (08|16)\]" -> "$$ARRAY"
 
 fn main() {
     #[cfg(target_pointer_width="64")]
@@ -7,7 +8,7 @@ fn main() {
     };
     #[cfg(target_pointer_width="32")]
     let bad = unsafe {
-        std::mem::transmute::<&[u8], [u8; 8]>(&[1u8])
+        std::mem::transmute::<&[u8], [u8; 08]>(&[1u8])
     };
     let _val = bad[0] + bad[bad.len()-1];
 }

tests/fail/transmute_fat1.stderr

@@ -1,7 +1,7 @@
 error: Undefined Behavior: type validation failed: encountered a pointer, but expected plain (non-pointer) bytes
   --> $DIR/transmute_fat1.rs:LL:CC
    |
-LL |         std::mem::transmute::<&[u8], [u8; 16]>(&[1u8])
+LL |         std::mem::transmute::<&[u8], $ARRAY>(&[1u8])
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered a pointer, but expected plain (non-pointer) bytes
    |
    = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior