Removing git-svn-authors, build-git.rb downloads jukka's committer list.
Removing git-svn-authors, build-git.rb downloads jukka's committer list.

git-svn-id: d8f3215415546ce936cf3b822120ca56e5ebeaa0@749529 13f79535-47bb-0310-9956-ffa450edef68

assaf/buildr,mariusk/buildr-kawa,apache/buildr,atoulme/buildr,ittayd/buildr,mariusk/buildr-kawa,stewi2/buildr,stewi2/buildr,atoulme/buildr,apache/buildr,apache/buildr,stewi2/buildr,assaf/buildr,stewi2/buildr,ittayd/buildr,liamchristopher/buildr,liamchristopher/buildr,apache/buildr,ittayd/buildr,liamchristopher/buildr,jpcaruana/buildr,jpcaruana/buildr,liamchristopher/buildr,jpcaruana/buildr,assaf/buildr,atoulme/buildr,mariusk/buildr-kawa,jpcaruana/buildr