nfsv3driver: Put the shared libs in /usr/lib64 where appropriate
nfsv3driver: Put the shared libs in /usr/lib64 where appropriate

Some Linux distributions (SUSE, RedHat) use /usr/lib64 instead of
/usr/lib (as found on Debian/Ubuntu).  Stemcells built with those would
not find the hand-installed NFS libraries in that case.

Fix this by attempting to detect where the libraries should go (based on
where libc lives), and copy the files to the appropriate directory.

cloudfoundry-incubator/nfs-volume-release,cloudfoundry-incubator/nfs-volume-release,cloudfoundry-incubator/nfs-volume-release