appveyor.yml: give up running TestThreadQueue#test_queue_with_trap

for mswin. We tried to increase timeout and execute separately but both
didn't work. Let me skip this until somebody starts to work on fixing
this behavior, since this makes AppVeyor almost impossible to be used as CI.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64943 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_thread_queue.rb

@@ -550,6 +550,9 @@ class TestThreadQueue < Test::Unit::TestCase
   end
 
   def test_queue_with_trap
+    if ENV['APPVEYOR'] == 'True' && RUBY_PLATFORM.match?(/mswin/)
+      skip 'This test fails too often on AppVeyor vs140'
+    end
     assert_in_out_err([], <<-INPUT, %w(INT INT exit), [])
       q = Queue.new
       trap(:INT){