Race condition in R installation

Imported from <a href="http://trac.sagemath.org/sage_trac/ticket/13428">trac #13428</a>.

Diff for the R spkg. For reference / review only.

Reported by: jdemeyer

Component: packages

CC: jhpalmieri

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

Authors: Jeroen Demeyer

Dependencies: 

Work issues: 

Reviewers: John Palmieri

Merged in: sage-5.4.beta1

Attachments: <ol><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/13428/r-2.14.0.p4.diff">r-2.14.0.p4.diff: Diff for the R spkg. For reference / review only.</a> by jdemeyer at 20120904T12:09:44</li></ol>