Define variable for amr static libs


git-svn-id: http://scm.sipfoundry.org/rep/sipX/main@12229 a612230a-c5fa-0310-af8b-88eea846685b
Link amr codec plugins with static amr libs


git-svn-id: http://scm.sipfoundry.org/rep/sipX/main@12230 a612230a-c5fa-0310-af8b-88eea846685b