This commit adds the coverage badge in README.md
Signed-off-by: Dongju Chae <dongju.chae@samsung.com>
## NPU SystemService
+[![Code Coverage](http://nnsuiteci.mooo.com/NPU_SystemService/ci/badge/codecoverage.svg)](http://nnsuiteci.mooo.com/NPU_SystemService/ci/gcov_html/index.html)
+
- Software Stack: http://suprem.sec.samsung.net/confluence/display/ODLC/NPU+OS+Stack
- CI Server: http://nnsuiteci.mooo.com/NPU_SystemService/ci/taos/
- Code Coverage: http://nnsuiteci.mooo.com/NPU_SystemService/ci/gcov_html/