test/ruby/test_rubyoptions.rb (test_script_from_stdin): scale timeout

for Solaris.

https://rubyci.org/logs/rubyci.s3.amazonaws.com/unstable10s/ruby-master/log/20190525T131909Z.fail.html.gz

test/ruby/test_rubyoptions.rb

@@ -790,8 +790,9 @@ class TestRubyOptions < Test::Unit::TestCase
           m.print("\C-d")
           pid = spawn(EnvUtil.rubybin, :in => s, :out => w)
           w.close
+          timeout = EnvUtil.apply_timeout_scale(3)
           assert_nothing_raised('[ruby-dev:37798]') do
-            result = Timeout.timeout(3) {r.read}
+            result = Timeout.timeout(timeout) {r.read}
           end
           Process.wait pid
         }