* lib/rubygems: Update to RubyGems 2.4.5.

* test/rubygems:  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48729 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rubygems/resolver/api_set.rb

@@ -72,7 +72,7 @@ class Gem::Resolver::APISet < Gem::Resolver::Set
     @to_fetch += needed
   end
 
-  def prefetch_now
+  def prefetch_now # :nodoc:
     needed, @to_fetch = @to_fetch, []
 
     uri = @dep_uri + "?gems=#{needed.sort.join ','}"

lib/rubygems/resolver/api_specification.rb

@@ -19,7 +19,7 @@ class Gem::Resolver::APISpecification < Gem::Resolver::Specification
     @set = set
     @name = api_data[:name]
     @version = Gem::Version.new api_data[:number]
-    @platform = api_data[:platform]
+    @platform = Gem::Platform.new api_data[:platform]
     @dependencies = api_data[:dependencies].map do |name, ver|
       Gem::Dependency.new name, ver.split(/\s*,\s*/)
     end

lib/rubygems/resolver/installer_set.rb

@@ -154,7 +154,7 @@ class Gem::Resolver::InstallerSet < Gem::Resolver::Set
   end
 
   def prefetch(reqs)
-    @remote_set.prefetch(reqs)
+    @remote_set.prefetch(reqs) if consider_remote?
   end
 
   def prerelease= allow_prerelease