nfs-utils: change owner/group of directories in do_install

nfs-utils: change owner/group of directories in do_install

Previously, the owners/groups of directories like /var/lib/nfs/statd
are changed in the init script, /etc/init.d/nfscommon. This is actually
a workaround. We need to change them at do_install time.

This patch fixes the above problem by changing owners/groups at do_install
time.

Besides, configuration option '--with-staduser=nobody' is changed to be
'--with-statduser=rpcuser'. And /var/lib/nfs/statd/state is modified to have
permission 0644, just like other distros (ubuntu, fedora, etc.) do.

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>