* marshal.c (r_entry0): don't taint classes and modules because
Marshal.load just return the dumped classes and modules.
[Bug #7325] [ruby-core:49198]
* test/ruby/test_marshal.rb: related test.
Marshal.load just returns the dumped classes and modules.
merge revision(s) 38357,38363: [Backport #7325]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@38468 b2dd03c8-39d4-4d8f-98ff-823fe69b080e