Use "tar", not "cp -pPRL", to copy files in sage-bdist

Imported from <a href="http://trac.sagemath.org/sage_trac/ticket/14236">trac #14236</a>.



Reported by: jdemeyer

Component: scripts

CC: jhpalmieri

Report Upstream: N/A

Authors: Jeroen Demeyer

Dependencies: 

Work issues: 

Reviewers: John Palmieri

Merged in: sage-5.8.beta4

Attachments: <ol><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/14236/14236_bdist.patch">14236_bdist.patch: </a> by jdemeyer at 20130306T20:45:53</li></ol>