Jon Turney authored Mar 02, 2015 and Hugo Beauzée-Luyssen committed Dec 20, 2017

Tweak the protobuf svn rev number requested slightly to r402, as r407
corresponds to a change in /wiki, which is not a path that svn-git considers by
default.

v2:
Update to handle fetching lss from git not svn
Rename script to fetch-externals
Update README.md

v3:
Drop protobuf rev number tweak now dep comes from git
Sort deps to order check out of src/testing/ before src/testing/gtest/

v4:
Use print as a function