Ignore the style executable used for testing
Ignore the style executable used for testing

This is used for running style checks on the libc codebase but shouldn't
be committed, so adding it to the .gitignore file.

rust-lang/libc,rust-lang/libc,rust-lang-nursery/libc,rust-lang/libc,rust-lang-nursery/libc,rust-lang-nursery/libc