* lib/rubygems: Update to RubyGems 2.4.1 master(713ab65)

Complete history at:
  https://github.com/rubygems/rubygems/blob/master/History.txt#L3-L216
* test/rubygems:  ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47582 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/rubygems/test_gem_resolver_specification.rb

@@ -3,6 +3,7 @@ require 'rubygems/test_case'
 class TestGemResolverSpecification < Gem::TestCase
 
   class TestSpec < Gem::Resolver::Specification
+    attr_writer :source
     attr_reader :spec
 
     def initialize spec
@@ -12,6 +13,26 @@ class TestGemResolverSpecification < Gem::TestCase
     end
   end
 
+  def test_install
+    gemhome = "#{@gemhome}2"
+    spec_fetcher do |fetcher|
+      fetcher.gem 'a', 1
+    end
+
+    a = util_spec 'a', 1
+
+    a_spec = TestSpec.new a
+    a_spec.source = Gem::Source.new @gem_repo
+
+    a_spec.install :install_dir => gemhome
+
+    assert_path_exists File.join gemhome, 'gems', a.full_name
+
+    expected = File.join gemhome, 'specifications', a.spec_name
+
+    assert_equal expected, a_spec.spec.loaded_from
+  end
+
   def test_installable_platform_eh
     a = util_spec 'a', 1
 
@@ -28,5 +49,16 @@ class TestGemResolverSpecification < Gem::TestCase
     refute b_spec.installable_platform?
   end
 
+  def test_source
+    a = util_spec 'a', 1
+
+    source = Gem::Source.new @gem_repo
+
+    a_spec = TestSpec.new a
+    a_spec.source = source
+
+    assert_equal source, a_spec.source
+  end
+
 end