The package isn't marked linux-only, but pulling locale from
glibc effectively limited it to linux. Using the generalized
locale attr gets it building on macOS.
Also:
- While looking into this, I noticed that the script only
uses xmessage if zenity isn't present, so I think we can
drop that dependency.
- Not super familiar with what the package should run on,
but I went ahead and set the platform meta based on what
I've personally verified.
