librustrt got removed

[zsiciarz]

rust-lang/rust#19654 got merged recently and the change is already in the latest nightly (rustc 0.13.0-nightly (cc19e3380 2014-12-20 20:00:36 +0000)). This breaks the build with the following error:

$ cargo build
    Updating registry `https://github.com/rust-lang/crates.io-index`
   Compiling pkg-config v0.1.2
   Compiling openssl-sys v0.2.6 (file:///home/zbyszek/Development/Rust/rust-openssl)
/home/zbyszek/Development/Rust/rust-openssl/openssl-sys/src/lib.rs:5:1: 5:21 error: can't find crate for `rustrt`
/home/zbyszek/Development/Rust/rust-openssl/openssl-sys/src/lib.rs:5 extern crate rustrt;
                                                                     ^~~~~~~~~~~~~~~~~~~~
error: aborting due to previous error
Could not compile `openssl-sys`.

[sfackler]

Should be fixed now.