Close fds.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46216 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/openssl/test_pair.rb

@@ -87,6 +87,7 @@ module OpenSSL::TestEOF1M
     yield s1
   ensure
     th.join
+    s1.close
   end
 end
 
@@ -97,6 +98,7 @@ module OpenSSL::TestEOF2M
     yield s2
   ensure
     th.join
+    s2.close
   end
 end