CRM-13722 Fixes description of country_id in contact API.

http://issues.civicrm.org/jira/browse/CRM-13722

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* CRM-13722: Contact API shows wrong title of field country_id
  http://issues.civicrm.org/jira/browse/CRM-13722
Merge pull request #1936 from johanv/4.4

CRM-13722 Fixes description of country_id in contact API.