Import latest gemspec from ruby/fileutils.

* Bump version to 0.7.1. Beucause fileutils-0.7 is alread reserverd
    on rubygems.org.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58326 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/fileutils.gemspec

@@ -1,16 +1,18 @@
 Gem::Specification.new do |s|
   s.name = "fileutils"
-  s.version = '0.0.1'
+  s.version = '0.7.1'
   s.date = '2017-02-06'
   s.summary = "Several file utility methods for copying, moving, removing, etc."
   s.description = "Several file utility methods for copying, moving, removing, etc."
 
   s.require_path = %w{lib}
-  s.files = %w{fileutils.rb}
+  s.files = [".gitignore", ".travis.yml", "Gemfile", "LICENSE.txt", "README.md", "Rakefile", "bin/console", "bin/setup", "fileutils.gemspec", "lib/fileutils.rb"]
   s.required_ruby_version = ">= 2.5.0dev"
 
   s.authors = ["Minero Aoki"]
   s.email = [nil]
   s.homepage = "https://www.ruby-lang.org"
   s.license = "BSD-2-Clause"
+
+  s.add_development_dependency 'rake'
 end