Fix "hardcoded" 'gcc' in ratpoints 2.1.3 [p2]

Imported from <a href="http://trac.sagemath.org/sage_trac/ticket/12682">trac #12682</a>.

Diff between the vanilla Makefile and the (patched) one of the p3.  For reference and (better) review only.

Reported by: leif

Component: packages

CC: rlm,, jdemeyer,, rohana,, mjo

Report Upstream: N/A

Authors: Leif Leonhardy

Dependencies: 

Work issues: 

Reviewers: R. Andrew Ohana

Merged in: sage-5.0.beta9

Attachments: <ol><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/12682/ratpoints-2.1.3.p2-p3.diff">ratpoints-2.1.3.p2-p3.diff: Diff between the p2 and my p3. For reference / review only.</a> by leif at 20120317T14:17:00</li><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/12682/ratpoints-2.1.3-Makefile.vanilla-p3.diff">ratpoints-2.1.3-Makefile.vanilla-p3.diff: Diff between the vanilla Makefile and the (patched) one of the p3.  For reference and (better) review only.</a> by leif at 20120317T14:31:45</li></ol>