README.md - RAM requirement on 32-bit linux

[MagaTailor]

Running /usr/bin/time -v make to build rust (using local llvm) shows the maximum memory usage at 715 megabytes. (on arm linux it's even less @ 580M)

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @brson (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

Please see the contribution instructions for more information.

[brson]

Thanks for updating this.

Instead, can we maybe rephrase this entire sentence to something like 'Rust needs between 600MiB and 1.5GiB to build, depending on platform. If it hits swap...'?

Please also squash these commits.

[MagaTailor]

Yeah, much cleaner!
I'd already deleted my repo - do I have to resubmit or can you edit the PR?

[tshepang]

@petevine re-submit and close this one