Early draft spec of Strict language pragma

[Johan Tibell]

Hi!

I started a draft spec for the Strict language pragma we chatted about
during our call a while ago. I made the big mistake of writing it much
after the actual discussion, so I forgot most of the details.

https://ghc.haskell.org/trac/ghc/wiki/StrictPragma

Perhaps if you could ask questions that you don't think are answered
in the wiki page I can start fleshing it out more?

P.S. I've included our chat log at the bottom of the wiki page.

-- Johan