Generate coverage report after fixing file permissions

[andrewkroh]

This changes the Makefile to run coverage-report after fix-permissions. This allows coverage-report to be able to fully traverse the contents the build dir.

[andrewkroh]

This PR doesn't fix the errors in the logs, but it should fix the coverage reports.

This line executes for each make invocation and is what generates the "Permission denied" warnings.

make fix-permissions corrects the permissions for files in the build dir. But there are still files in the repo that are owned by root after running the build in Docker. Those files and dirs are:

./filebeat/tests/system/test_load.pyc
./filebeat/tests/system/test_harvester.pyc
./filebeat/tests/system/filebeat.pyc
./filebeat/tests/system/test_fields.pyc
./filebeat/tests/system/test_multiline.pyc
./filebeat/tests/system/test_shutdown.pyc
./filebeat/tests/system/test_processors.pyc
./filebeat/tests/system/test_registrar.pyc
./filebeat/tests/system/test_modules.pyc
./filebeat/tests/system/test_publisher.pyc
./filebeat/tests/system/test_prospector.pyc
./filebeat/tests/system/test_reload.pyc
./filebeat/tests/system/test_json.pyc
./filebeat/tests/system/test_crawler.pyc
./filebeat/tests/system/test_migration.pyc
./filebeat/tests/files/logs/nasa-50k.log
./filebeat/data
find: `./filebeat/data': Permission denied
./filebeat/filebeat.test
./metricbeat/tests/system/test_kafka.pyc
./metricbeat/tests/system/test_base.pyc
./metricbeat/tests/system/metricbeat.pyc
./metricbeat/tests/system/test_docker.pyc
./metricbeat/tests/system/test_processors.pyc
./metricbeat/tests/system/test_mongodb.pyc
./metricbeat/tests/system/test_haproxy.pyc
./metricbeat/tests/system/test_postgresql.pyc
./metricbeat/tests/system/test_config.pyc
./metricbeat/tests/system/test_zookeeper.pyc
./metricbeat/tests/system/test_redis.pyc
./metricbeat/tests/system/test_reload.pyc
./metricbeat/tests/system/test_prometheus.pyc
./metricbeat/tests/system/test_system.pyc
./metricbeat/tests/system/test_apache.pyc
./metricbeat/tests/system/test_mysql.pyc
./metricbeat/metricbeat.test
./metricbeat/data
find: `./metricbeat/data': Permission denied
./libbeat/dashboards/import_dashboards
./libbeat/tests/system/test_base.pyc
./libbeat/tests/system/beat/beat.pyc
./libbeat/tests/system/beat/__init__.pyc
./libbeat/tests/system/base.pyc
./libbeat/tests/system/test_dashboard.pyc
./libbeat/libbeat.test
./libbeat/data
find: `./libbeat/data': Permission denied

Should we expand fix-permissions to cover these files/dirs too? Maybe something like find . -uid 0 -exec chown myuid:mygid {} \;

[ruflin]

@andrewkroh +1 on expanding it to all the files with the "wrong" permissions.