merge revision(s) 43008: [Backport #8769]

	* process.c (rb_fork_internal): remove cloexec setting on pipes
	  created by rb_cloexec_pipe.  patch by normalperson (Eric Wong) at
	  [ruby-core:56523].  [Bug #8769]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@43227 b2dd03c8-39d4-4d8f-98ff-823fe69b080e