Retagging release branch

llvm-svn: 52171

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SVN tag also included these previous commits:

Author: Tanya Lattner <tonic@nondot.org>
Date: Tue Jun 10 05:49:26 2008 +0000

    Retagging branch.
    
    llvm-svn: 52170

Author: Tanya Lattner <tonic@nondot.org>
Date: Mon Jun 09 07:17:08 2008 +0000

    Tag 2.3 release.
    
    llvm-svn: 52132

Author: Tanya Lattner <tonic@nondot.org>
Date: Mon Jun 09 06:34:23 2008 +0000

    Tag release 2.3
    
    llvm-svn: 52127