Alignment for #load_directory data

[leecommamichael]

For #load, I think we can influence alignment by specifying a type for the variable, but I'm using #load_directory.

I'm sending the data from a #load_directory file into a third-party SDK which interprets the bytes as []i16, and it's completely hostile (emits an error) to unaligned loads. I tossed a little patch in the backend to just align such data to 16 bytes (overkill) as part of a rough test, and my issue resolved.

Perhaps the natural alignment of the register-size/pointer-size could be a decent default alignment for loaded directory data? I guess I suggest that since:

• I'm still learning about designing these things, and am interested in critique of my suggestion
• I don't see how you'd specify an alignment for the underlying buffer given what I know of the language.