Avoid tempfile leaks using Tempfile.create instead of Tempfile.open.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46117 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/resolv/test_addr.rb

@@ -17,7 +17,7 @@ class TestResolvAddr < Test::Unit::TestCase
 
   def test_invalid_byte_comment
     bug9273 = '[ruby-core:59239] [Bug #9273]'
-    Tempfile.open('resolv_test_addr_') do |tmpfile|
+    Tempfile.create('resolv_test_addr_') do |tmpfile|
       tmpfile.print("\xff\x00\x40")
       tmpfile.close
       hosts = Resolv::Hosts.new(tmpfile.path)

test/resolv/test_dns.rb

@@ -153,7 +153,7 @@ class TestResolvDNS < Test::Unit::TestCase
 
   def test_invalid_byte_comment
     bug9273 = '[ruby-core:59239] [Bug #9273]'
-    Tempfile.open('resolv_test_dns_') do |tmpfile|
+    Tempfile.create('resolv_test_dns_') do |tmpfile|
       tmpfile.print("\xff\x00\x40")
       tmpfile.close
       assert_nothing_raised(ArgumentError, bug9273) do