Fixed issue where gemspec would include buildr.pdf.
Fixed issue where gemspec would include buildr.pdf.

git-svn-id: d8f3215415546ce936cf3b822120ca56e5ebeaa0@753372 13f79535-47bb-0310-9956-ffa450edef68

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