Ruby » Ruby master

• ext/psych/psych.gemspec, lib/rdoc/rdoc.gemspec: Use file list instead of
  git output. It shows warning message when invoke make install
  [Bug #12736][ruby-dev:49778]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56104 b2dd03c8-39d4-4d8f-98ff-823fe69b080e