merge revision(s) 37527: [Backport #7293]
* ext/zlib/extconf.rb: Recognize zlibwapi as linking library. Patch by Daniel Berger. [ruby-core:44979] [Feature #6421]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@37561 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 37527: [Backport #7293]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@37561 b2dd03c8-39d4-4d8f-98ff-823fe69b080e