geocouch: Uuse tagged version

This adds the hard commit hash to the URL instead of using the master
branch which ensures that the hash stays valid and the code works with
1.2.0.

Fixes Homebrew/homebrew#13228.
Closes Homebrew/homebrew#13137.

Signed-off-by: Charlie Sharpsteen <source@sharpsteen.net>

Formula/geocouch.rb

@@ -3,8 +3,9 @@ require 'formula'
 class Geocouch < Formula
   homepage 'https://github.com/couchbase/geocouch'
   head 'https://github.com/couchbase/geocouch.git', :tag => 'couchdb1.2.x'
-  url 'https://github.com/couchbase/geocouch/zipball/couchdb1.2.x'
-  sha1 'ec9d912f39710b69115b6d0dae6277e387215377'
+  url 'https://github.com/couchbase/geocouch/tarball/couchdb1.2.x_v0.3.0'
+  sha1 'f8e9ba7b330550bd09531f70eb2d16c88e95f4d7'
+  version '1.2.0'
 
   devel do
     url 'https://github.com/couchbase/geocouch.git', :tag => 'master'