check EOPNOTSUPP.

* test/ruby/test_file.rb (test_open_tempfile_path): skip EOPNOTSUPP
  (observed on Ubuntu 16 on Docker).


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61318 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_file.rb

@@ -494,6 +494,8 @@ class TestFile < Test::Unit::TestCase
         io = File.open(tmpdir, File::RDWR | File::TMPFILE)
       rescue Errno::EINVAL
         skip 'O_TMPFILE not supported (EINVAL)'
+      rescue Errno::EOPNOTSUPP
+        skip 'O_TMPFILE not supported (EOPNOTSUPP)'
       end
 
       io.write "foo"