message: Fix constant alignment on macOS
diff: @@ -281,7 +281,12 @@ fn define_all_allocs(
  let mut data_ctx = DataContext::new();
  - data_ctx.define(alloc.bytes.to_vec().into_boxed_slice());
  + let mut bytes = alloc.bytes.to_vec();
  + // The machO backend of faerie doesn't align data objects correctly unless we do this.
  + while bytes.len() as u64 % 16 != 0 {
  + bytes.push(0xde);
  + }
  + data_ctx.define(bytes.into_boxed_slice());
  for &(offset, (_tag, reloc)) in alloc.relocations.iter() {
  let addend = {
  