test_time_tz.rb: past Japanese DST tzdata fix

* test/ruby/test_time_tz.rb (TestTimeTZ#test_asia_tokyo): fix
  the expected data at the end of DST.  [Bug #14438]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62508 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_time_tz.rb

@@ -340,7 +340,7 @@ End
 Asia/Tokyo  Sat May  5 14:59:59 1951 UTC = Sat May  5 23:59:59 1951 JST isdst=0 gmtoff=32400
 Asia/Tokyo  Sat May  5 15:00:00 1951 UTC = Sun May  6 01:00:00 1951 JDT isdst=1 gmtoff=36000
 Asia/Tokyo  Sat Sep  8 13:59:59 1951 UTC = Sat Sep  8 23:59:59 1951 JDT isdst=1 gmtoff=36000
-Asia/Tokyo  Sat Sep  8 14:00:00 1951 UTC = Sun Sep  9 00:00:00 1951 JST isdst=0 gmtoff=32400
+Asia/Tokyo  Sat Sep  8 14:00:00 1951 UTC = Sat Sep  8 23:00:00 1951 JST isdst=0 gmtoff=32400
 End
 Asia/Tokyo  Sat May  5 16:59:59 1951 UTC = Sun May  6 01:59:59 1951 JST isdst=0 gmtoff=32400
 Asia/Tokyo  Sat May  5 17:00:00 1951 UTC = Sun May  6 03:00:00 1951 JDT isdst=1 gmtoff=36000