There is no `GIT_FILEMODE_COMMIT` in `libgit2_sys::git_filemode_t`

[emk]

While I was trying to update cargo-extras, it looks like the cargo build has failed against the most recent Rust nightly:

$ multirust run nightly rustc --version
rustc 1.6.0-nightly (9303055f3 2015-11-19)
$ multirust run nightly cargo install cargo-extras
    Updating registry `https://github.com/rust-lang/crates.io-index`
 Downloading cargo-extras v0.1.1
...
   Compiling cargo v0.6.0
/home/emk/.multirust/toolchains/nightly/cargo/registry/src/github.com-0a35038f75765ae4/cargo-0.6.0/src/cargo/sources/path.rs:147:17: 147:65 error: unresolved import `libgit2_sys::git_filemode_t::GIT_FILEMODE_COMMIT`. There is no `GIT_FILEMODE_COMMIT` in `libgit2_sys::git_filemode_t` [E0432]
/home/emk/.multirust/toolchains/nightly/cargo/registry/src/github.com-0a35038f75765ae4/cargo-0.6.0/src/cargo/sources/path.rs:147             use libgit2_sys::git_filemode_t::GIT_FILEMODE_COMMIT;
                                                                                                                                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[alexcrichton]

Ah yeah should be fixed by #2154!