.travis.yml: Fix coverage upload.
diff --git a/.travis.yml b/.travis.yml
index 3040764..0b0d504 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,6 +16,6 @@ script:
after_success:
- sudo apt-get install python3
- - pip install --user cpp-coveralls
+ - pip install --usr cpp-coveralls
- ../scripts/run-commonmark-tests.sh
- - coveralls -r md4c
+ - coveralls -r .. -i md4c