std::f32::consts shouldn't be blank

[mdinger]

std::f32::consts and std::f64::consts are blank and probably shouldn't be. i8-64 and u8-64 don't have consts sections.

This is probably temporary and related to constants being shuffled but I couldn't find the issue regarding it.

[sfackler]

I think they're showing up blank because rustdoc doesn't render consts.

[mdinger]

I expected to find constants like pi and e there but I'm not sure which ones should actually be there.

[sfackler]

They're all there, but they're consts so rustdoc isn't outputting them: http://doc.rust-lang.org/src/core/home/rustbuild/src/rust-buildbot/slave/nightly-linux/build/src/libcore/num/f32.rs.html#48-105