Shorten timeout for csv

It usually ends in a few seconds, and less than 10 seconds even on
Windows.  But recently it stalls 10 minutes and times out.

Author: nobu

tool/test-bundled-gems.rb

@@ -73,6 +73,9 @@
   when "test-unit"
     test_command = [ruby, "-C", "#{gem_dir}/src/#{gem}", "test/run.rb"]
 
+  when "csv"
+    first_timeout = 30
+
   when "win32ole"
     next unless /mswin|mingw/ =~ RUBY_PLATFORM