Use cwd for coverage

.drone.yml

@@ -16,13 +16,10 @@ steps:
   - name: collect code coverage
     image: kcov/kcov:latest
     commands:
-      - mkdir -p coverage
-      - kcov coverage abra || true
+      - kcov . abra || true
 
   - name: send code coverage report to codecov
     image: robertstettner/drone-codecov
-    commands:
-      - codecov -s coverage
     secrets: [codecov_token]
 
 trigger: