* time.c: raise exception when minutes of utc_offset is out of 00-59.
  patch is from Kenichi Kamiya.
  [ruby-dev:47539] [Bug #8679]

* test/ruby/test_time.rb: test for above.
  patch is from Kenichi Kamiya.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47676 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2014-09-22

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47677 b2dd03c8-39d4-4d8f-98ff-823fe69b080e