Merged revisions 336733 via svnmerge from

Merged revisions 336733 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.8

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  r336733 | tilghman | 2011-09-19 15:27:03 -0500 (Mon, 19 Sep 2011) | 11 lines

  Various changes to allow 1.8 to compile on Mac OS X Lion (10.7)

  * Makefile workaround for 10.6 extended to work on 10.7 and later.
  * Now uses the 'weak' symbol for Lion systems, which no longer support
    'weak_import'

  Closes ASTERISK-17612.
  Closes ASTERISK-18213.

  Tested by: tilghman, oej.
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/10@336734 65c4cc65-6c06-0410-ace0-fbb531ad65f3