Skip three tests on FreeBSD 13

Some tests that use signals frequently fail randomly on FreeBSD 13.
Maybe something around signals has changed in FreeBSD 13.
This change skips them tentatively.

test/excludes/TestThread.rb

@@ -1,5 +1,14 @@
 # frozen_string_literal: false
 exclude(/_stack_size$/, 'often too expensive')
 if /freebsd13/ =~ RUBY_PLATFORM
+  # http://rubyci.s3.amazonaws.com/freebsd13/ruby-master/log/20220216T143001Z.fail.html.gz
+  #
+  #   1) Error:
+  # TestThread#test_signal_at_join:
+  # Timeout::Error: execution of assert_separately expired timeout (120 sec)
+  # pid 30743 killed by SIGABRT (signal 6) (core dumped)
+  # |
+  #
+  #     /usr/home/chkbuild/chkbuild/tmp/build/20220216T143001Z/ruby/test/ruby/test_thread.rb:1390:in `test_signal_at_join'
   exclude(:test_signal_at_join, 'gets stuck somewhere')
 end

test/excludes/TestThreadQueue.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: false
+if /freebsd13/ =~ RUBY_PLATFORM
+  # http://rubyci.s3.amazonaws.com/freebsd13/ruby-master/log/20220308T023001Z.fail.html.gz
+  #
+  #   1) Failure:
+  # TestThreadQueue#test_thr_kill [/usr/home/chkbuild/chkbuild/tmp/build/20220308T023001Z/ruby/test/ruby/test_thread_queue.rb:175]:
+  # only 169/250 done in 60 seconds.
+  exclude(:test_thr_kill, 'gets stuck somewhere')
+end

test/io/console/test_io_console.rb

@@ -383,7 +383,14 @@ def test_intr
         assert_ctrl("#{cc.ord}", cc, r, w)
         assert_ctrl("Interrupt", cc, r, w) unless /linux|solaris/ =~ RUBY_PLATFORM
       end
-      if cc = ctrl["dsusp"]
+      # This test fails randomly on FreeBSD 13
+      # http://rubyci.s3.amazonaws.com/freebsd13/ruby-master/log/20220304T163001Z.fail.html.gz
+      #
+      #   1) Failure:
+      # TestIO_Console#test_intr [/usr/home/chkbuild/chkbuild/tmp/build/20220304T163001Z/ruby/test/io/console/test_io_console.rb:387]:
+      # <"25"> expected but was
+      # <"-e:12:in `p': \e[1mexecution expired (\e[1;4mTimeout::Error\e[m\e[1m)\e[m">.
+      if cc = ctrl["dsusp"] && /freebsd/ !~ RUBY_PLATFORM
         assert_ctrl("#{cc.ord}", cc, r, w)
         assert_ctrl("#{cc.ord}", cc, r, w)
         assert_ctrl("#{cc.ord}", cc, r, w)