Fix compile errors caused by r4500 / r4501.

Fix compile errors caused by r4500 / r4501.

* Add ast_register_cleanup to utils/clicompat.c to deal with
  any utils that copy sources from main.
* Asterisk 13+: remove unused variables from core_local.c.

Review: https://reviewboard.asterisk.org/r/4534/
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Merged revisions 433499 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 433500 from http://svn.asterisk.org/svn/asterisk/branches/13

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@433501 65c4cc65-6c06-0410-ace0-fbb531ad65f3