rbinstall.rb: fix bundled gems location

* tool/rbinstall.rb (gem): fix changing permissions of installed
  bundled gems.  [Fix GH-812]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49238 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Tue Jan 13 21:59:24 2015  Michal Papis  <mpapis@gmail.com>
+
+	* tool/rbinstall.rb (gem): fix changing permissions of installed
+	  bundled gems.  [Fix GH-812]
+
 Tue Jan 13 21:57:12 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* common.mk (distclean-local): remove autom4te.cache generated by

tool/rbinstall.rb

@@ -730,9 +730,9 @@ install?(:ext, :comm, :gem) do
     end
     # fix directory permissions
     # TODO: Gem.install should accept :dir_mode option or something
-    File.chmod($dir_mode, *Dir.glob(with_destdir(Gem.dir)+"/**/"))
+    File.chmod($dir_mode, *Dir.glob(with_destdir(gem_dir)+"/**/"))
     # fix .gemspec permissions
-    File.chmod($data_mode, *Dir.glob(with_destdir(Gem.dir)+"/specifications/*.gemspec"))
+    File.chmod($data_mode, *Dir.glob(with_destdir(gem_dir)+"/specifications/*.gemspec"))
   else
     puts "skip installing bundle gems because of lacking zlib"
   end