travis: enable sending coverage data to codecov.io

.travis.yml

@@ -14,6 +14,7 @@ env:
  - DIST_DOM0=fc25 USE_QUBES_REPO_VERSION=4.0 USE_QUBES_REPO_TESTING=1
 
 after_success:
+  - codecov
   - ~/qubes-builder/scripts/travis-deploy
 
 # don't build tags which are meant for code signing only

ci/requirements.txt

@@ -1,6 +1,7 @@
 # WARNING: those requirements are used only for travis-ci.org
 # they SHOULD NOT be used under normal conditions; use system package manager
 coverage
+codecov
 docutils
 jinja2
 lxml