Fix spelling error in fs_getverify man page

priviledges -> privileges

Change-Id: I56d233feb7a05d184b26d24d80fbdd4c1e0d0896
Reviewed-on: http://gerrit.openafs.org/10023
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Ken Dreyer <ktdreyer@ktdreyer.com>