Document -optl-static

[Simon Marlow]

> I think it would be a good idea to add -optl-static to the flags
> described in
> http://www.haskell.org/ghc/docs/latest/html/users_guide/option
> s-phases.html#OPTIONS-LINKER
> perhaps in the vincinity of -static & -dynamic. Although this=20
> could be considered
> redundant, it might save some time trying out how to build=20
> entirely static
> binaries. Opinions?

I think the -static flag probably ought to be passed to the linker, so
you wouldn't need -optl-static.  Is there any reason you might need
-static but not -optl-static?

Cheers,
	Simon