merge revision(s) 39614: [Backport #8033]

	configure.in: fix unexpand_shvar

	* configure.in (unexpand_shvar): remove guarding quotes at last.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@39915 b2dd03c8-39d4-4d8f-98ff-823fe69b080e