Add travis badge to the dtolnay/cxx

README.md

@@ -464,7 +464,7 @@ See also [Foreign Function Interface](https://doc.rust-lang.org/book/first-editi
   * [Sean1708/rusty-cheddar](https://github.com/Sean1708/rusty-cheddar) — generates C header files from Rust source files [<img src="https://api.travis-ci.org/Sean1708/rusty-cheddar.svg?branch=master">](https://travis-ci.org/Sean1708/rusty-cheddar)
 * C++
   * [rust-lang/rust-bindgen](https://github.com/rust-lang/rust-bindgen) — A Rust bindings generator
-  * [dtolnay/cxx](https://github.com/dtolnay/cxx) - Safe interop between Rust and C++
+  * [dtolnay/cxx](https://github.com/dtolnay/cxx) - Safe interop between Rust and C++ [<img src="https://api.travis-ci.com/dtolnay/cxx.svg?branch=master">](https://travis-ci.com/dtolnay/cxx)
 * Erlang
   * [rusterlium/rustler](https://github.com/rusterlium/rustler) — safe Rust bridge for creating Erlang NIF functions [<img src="https://api.travis-ci.org/rusterlium/rustler.svg?branch=master">](https://travis-ci.org/rusterlium/rustler)
 * Haskell