Make crash_logs configurable

Imported from <a href="http://trac.sagemath.org/sage_trac/ticket/13983">trac #13983</a>.



Reported by: jdemeyer

Component: scripts

CC: vbraun

Report Upstream: N/A

Authors: Jeroen Demeyer

Dependencies: 

Work issues: 

Reviewers: Volker Braun

Merged in: sage-5.7.beta0

Attachments: <ol><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/13983/13983_config_crash_logs.patch">13983_config_crash_logs.patch: </a> by jdemeyer at 20130122T13:30:21</li></ol>