GSoC 2018 Open Projects pages

Dear All,

GSoC 2018 is coming and it's time to update the Open Projects pages.
Please check them for any outdated / finished projects, add new, etc.

Feel free to remove the code layout project from the open ideas page
that I proposed last year, as Michael Spencer implemented it in lld.

Can I suggest to add MACH-O LLD improvement to the Open Projects page?

Sure. But for GSoC part we also need someone willing to mentor this project.