.time dependency from *.rb install target. It causes needless
*.rb install. [Bug #7698] [ruby-core:51437]
Reported by Tadashi Saito. Thanks!!!
* test/rubygems/test_gem_installer.rb
(TestGemInstaller#test_install_extension_and_script): Add a test
for the above change.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38864 b2dd03c8-39d4-4d8f-98ff-823fe69b080e