merge revision(s) 40664:

	* signal.c (rb_f_kill): fixes typo. s/HAS_KILLPG/HAVE_KILLPG/.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@40675 b2dd03c8-39d4-4d8f-98ff-823fe69b080e