merge revision(s) 39696: [Backport #7991]

	* lib/rubygems/ext/ext_conf_builder.rb (Gem::Ext::ExtConfBuilder.build):
	  it is impossible to predict which file will be installed to where,
	  by the arguments, so use intermediate destination directory always.
	  [Bug #7698]

	* lib/rubygems/ext/ext_conf_builder.rb (Gem::Ext::ExtConfBuilder.build):
	  it is impossible to predict which file will be installed to where,
	  by the arguments, so use intermediate destination directory always.
	  [Bug #7698]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@39801 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 39731: [Backport #7991]

	* lib/rubygems/commands/setup_command.rb:  Don't delete non-rubygems
	  files when installing RubyGems.

	* test/rubygems/test_gem_commands_setup_command.rb:  Test for the
	  above.

	* lib/rubygems/ext/ext_conf_builder.rb:  Use full path to siteconf.rb
	  in case the extconf.rb changes directories (like memcached does).

	* lib/rubygems/package.rb:  Remove double slash from path.

	* test/rubygems/test_gem_package.rb:  Test for the above.

	* test/rubygems/test_gem_package_old.rb:  ditto.

	* lib/rubygems/source.rb:  Revert automatic HTTPS upgrade

	* lib/rubygems/spec_fetcher.rb:  ditto.

	* test/rubygems/test_gem_remote_fetcher.rb:  ditto.

	* test/rubygems/test_gem_source.rb:  ditto.

	* test/rubygems/test_gem_spec_fetcher.rb:  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@39802 b2dd03c8-39d4-4d8f-98ff-823fe69b080e