Fix test.

src/arch/x86_64/paging/entry.rs

@@ -82,6 +82,7 @@ impl Entry {
 mod tests {
     #[test]
     fn entry_has_required_arch_alignment() {
-        assert_eq!(core::mem::align_of::<Entry>(), core::mem::align_of::<u64>());
+        use super::Entry;
+        assert!(core::mem::align_of::<Entry>() >= core::mem::align_of::<u64>(), "alignment of Entry is less than the required alignment of u64 ({} < {})", core::mem::align_of::<Entry>(), core::mem::align_of::<u64>());
     }
 }