libs: update to nfs4j-0.8.3

performance improvements

Changelog for nfs4j-0.8.2..nfs4j-0.8.3
    * [35b8c88] pseudofs: do not check READ_ATTR bit for unix
    * [fbcd95b] avoid extra copy of data buffer in nfs3.read

Target: 2.10
Require-book: no
Require-notes: no
Merge pull request #1042 from kofemann/update-nfs-2.10

libs: update to nfs4j-0.8.3