Disable sage-make_relative when upgrading

Imported from <a href="http://trac.sagemath.org/sage_trac/ticket/14027">trac #14027</a>.



Reported by: jdemeyer

Component: build

CC: 

Report Upstream: N/A

Authors: Jeroen Demeyer

Dependencies: 

Work issues: 

Reviewers: Volker Braun

Merged in: sage-5.7.beta2

Attachments: <ol><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/14027/14027_dont_make_relative.patch">14027_dont_make_relative.patch: </a> by jdemeyer at 20130128T13:38:46</li></ol>