Put cargo directory on PATH.

Author: tomprince

.travis.yml

@@ -17,7 +17,9 @@ before_script:
   - |
     pip install 'travis-cargo<0.2' --user &&
     export PATH=$HOME/.local/bin:$PATH
-  - cargo install --force rustfmt
+  - |
+    cargo install --force rustfmt
+    export PATH=$HOME/.cargo/bin:$PATH
 script:
   - |
     travis-cargo build &&