Fix syntax of a print() in the scons file to unbreak building with most
recent scons version.

* SConstruct
  Use Python 3.0 valid syntax to make Scons 3.0.0 happy on both python 3.0
  and 2.7.

git-svn-id: https://svn.apache.org/repos/asf/serf/trunk@1811083 13f79535-47bb-0310-9956-ffa450edef68
1 file changed