pylint: More allowed C extensions
Fixes:
```
[E0611(no-name-in-module), ] No name 'parse' in module 'lxml.etree'
[E0611(no-name-in-module), ] No name 'murmurhash3' in module 'pysss_murmur'
```
Fixes: https://pagure.io/freeipa/issue/9278
Signed-off-by: Stanislav Levin <slev@altlinux.org>
Reviewed-By: Stanislav Levin <slev@altlinux.org>