Change incorrect OLD_ARCH header import

[svbutko]

Overview

The import was set incorrectly for OLD_ARCH which leads to project's failing build.

Test Plan

Build an iOS project with OLD_ARCH.

[robertherber]

@Naturalclar how soon is it possible with a new release including this? :)

Edit: I see now that I was a minute late to ask for it, thanks! 🥳

[Naturalclar]

@robertherber just released a new version! 🚀