PolyBoRi links against system -lboost_unit_test_framework

Imported from <a href="http://trac.sagemath.org/sage_trac/ticket/12963">trac #12963</a>.

Diff for the polybori spkg. For review only

Reported by: jdemeyer

Component: packages

CC: AlexanderDreyer

Report Upstream: Fixed upstream, in a later stable release.

Authors: Jeroen Demeyer

Dependencies: 

Work issues: 

Reviewers: Alexander Dreyer

Merged in: sage-5.0.1.rc0

Attachments: <ol><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/12963/polybori-0.8.1.p2.diff">polybori-0.8.1.p2.diff: Diff for the polybori spkg. For review only</a> by jdemeyer at 20120518T14:49:50</li></ol>