* process.c (redirect_dup2): set standard handles when new fd is stdio,
because if there is no allocated console at the moment Windows does
not automatically associate it for child process's standard handle.
this is adhoc workaround.
reported by Martin Thiede at [ruby-core:48542] [Bug #7239].
* io.c (rb_cloexec_dup2): ditto.
merge revision(s) 37388: [Backport #9232]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@44338 b2dd03c8-39d4-4d8f-98ff-823fe69b080e