CRM-14935: fix API version in drush_civicrm_cacheclear().
Merge pull request #149 from mlutfy/7.x-4.4-crm14935

CRM-14935: fix API version in drush_civicrm_cacheclear().
Merge remote-tracking branch 'upstream/7.x-4.4' into 7.x-4.4-7.x-master-2014-07-07-15-42-39

Conflicts:
	drush/civicrm.drush.inc