Only measure coverage of vdirsyncer/

i.e.: Ignore non-application code like  contrib/

Author: Hugo Osvaldo Barrera

Makefile

@@ -43,15 +43,15 @@ all:
 
 ci-test:
 	curl -s https://codecov.io/bash > $(CODECOV_PATH)
-	$(PYTEST) --cov-append tests/unit/ tests/system/
+	$(PYTEST) --cov vdirsyncer --cov-append tests/unit/ tests/system/
 	bash $(CODECOV_PATH) -c
 	[ "$(ETESYNC_TESTS)" = "false" ] || make test-storage
 
 ci-test-storage:
 	curl -s https://codecov.io/bash > $(CODECOV_PATH)
 	set -ex; \
 	for server in $(DAV_SERVER); do \
-		DAV_SERVER=$$server $(PYTEST) --cov-append tests/storage; \
+		DAV_SERVER=$$server $(PYTEST) --cov vdirsyncer --cov-append tests/storage; \
 	done
 	bash $(CODECOV_PATH) -c