Fix hardcoded 'g++' in Lcalc 1.23 [p9]

Imported from <a href="http://trac.sagemath.org/sage_trac/ticket/12681">trac #12681</a>.

Diff between the (patched) Makefile of the p9 and the p10.  For reference / review only.

Reported by: leif

Component: packages

CC: rishi,, 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/12681/lcalc-1.23.p9-p10.diff">lcalc-1.23.p9-p10.diff: Diff between the p9 and my p10. For reference / review only.</a> by leif at 20120317T12:19:05</li><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/12681/Lcalc-1.23-Makefile.p9-p10.diff">Lcalc-1.23-Makefile.p9-p10.diff: Diff between the (patched) Makefile of the p9 and the p10.  For reference / review only.</a> by leif at 20120317T12:20:32</li></ol>