re-add old assert/comment, but disable for aarch64

runtime/src/append_vec.rs

@@ -905,10 +905,16 @@ pub mod tests {
         // we can observe crafted value by ref
         {
             let executable_bool: &bool = &account.account_meta.executable;
-            // Depending on use, *executable_bool can be truthy or falsy due to direct memory manipulation.
-            // Behavior is dependent on compiler.
-            // assert! thinks !*executable_bool is true, for all compilers
+            // Depending on use, *executable_bool can be truthy or falsy due to direct memory manipulation
+            // assert_eq! thinks *executable_bool is equal to false but the if condition thinks it's not, contradictorily.
             assert!(!*executable_bool);
+            #[cfg(not(target_arch = "aarch64"))]
+            {
+                const FALSE: bool = false; // keep clippy happy
+                if *executable_bool == FALSE {
+                    panic!("This didn't occur if this test passed.");
+                }
+            }
             assert_eq!(*account.ref_executable_byte(), crafted_executable);
         }