merge revision(s) 39905,39919,39925,39945: [Backport #8163]

	* test/ruby/envutil.rb (assert_ruby_status): include stderr output.	  unlinked method entry. [Bug #8100] [ruby-core:53439]

	* proc.c (bm_free): need to clean up the mark flag of a free and


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@40254 b2dd03c8-39d4-4d8f-98ff-823fe69b080e