Compiletest_rs dependency fails to build

[dtolnay]

     Running `rustc /home/travis/.cargo/registry/src/gb.xjqchip.workers.dev-1ecc6299db9ec823/compiletest_rs-0.1.3/src/compiletest.rs --crate-name compiletest_rs --crate-type lib -g -C metadata=eae725b6e6055216 -C extra-filename=-eae725b6e6055216 --out-dir /home/travis/build/dtolnay/indoc/target/debug/deps --emit=dep-info,link -L dependency=/home/travis/build/dtolnay/indoc/target/debug/deps --extern log=/home/travis/build/dtolnay/indoc/target/debug/deps/liblog-bf16bb9a4912b11d.rlib --cap-lints allow`
error[E0063]: missing field `test_threads` in initializer of `test::TestOpts`
   --> /home/travis/.cargo/registry/src/gb.xjqchip.workers.dev-1ecc6299db9ec823/compiletest_rs-0.1.3/src/compiletest.rs:116:5
    |
116 |     test::TestOpts {
    |     ^^^^^^^^^^^^^^
error: aborting due to previous error
error: Could not compile `compiletest_rs`.

[dtolnay]

Filed upstream as Manishearth/compiletest-rs#44.