```
Removes stats about leveldb, univalue, and benchmark coverage from the
coverage reports. Since we don't test these three items specifically and
thus don't care about test coverage for these items.
This builds on top of #10511 to use the faster lcov -r replacement.
```
Backport of core PR10565 and PR11443
https://github.com/bitcoin/bitcoin/pull/10565/files
https://github.com/bitcoin/bitcoin/pull/11443/files