[R-SIG-Mac] svn now available from the tools

[Simon Urbanek]

If you want to build R from the svn repository you need svn (subversion). Xcode 10 has removed svn so it is no loner available from Apple, we are providing a binary (cmopatible with OS X 10.11 and higher) in
https://mac.r-project.org/tools/
(in "optional tools and libraries" at the bottom), direct link:
https://mac.r-project.org/tools/subversion-1.14.0-darwin15.6.tar.gz
It is a single-file signed, static build so has no dependencies and can be run from anywhere.

Cheers,
Simon