Add missing dependencies on i686

[m-r-r]

Hello,

I tried to build the crate on a GNU/Linux system with a i686 processor and it failed with the following message:

   Compiling notify v2.5.2
/home/mrr/.multirust/toolchains/stable/cargo/registry/src/github.zerozr99.workers.dev-121aea75f9ef2ce2/notify-2.5.2/src/lib.rs:3:27: 3:44 error: can't find crate for `mio` [E0463]
/home/mrr/.multirust/toolchains/stable/cargo/registry/src/github.zerozr99.workers.dev-121aea75f9ef2ce2/notify-2.5.2/src/lib.rs:3 #[cfg(target_os="linux")] extern crate mio;
                                                                                                                                          ^~~~~~~~~~~~~~~~~
error: aborting due to previous error

I added the missing dependencies in Cargo.toml, and now it works.

[passcod]

Merci beaucoup, et joyeux Noël !

[m-r-r]

De rien, toi aussi :-)