Update mclinker for LLVM rebase.

commit 6824c791204cf5daabdfe008ee8808799f348815
Author: Pete Chou <petechou@gmail.com>
Date:   Tue Jul 15 10:15:12 2014 +0800

    Fix typo in README.

Change-Id: Id7a525732ba33b5ac81a0da4c8d8f02d1f8c3a16
82 files changed