Redirect DataLayout from TargetMachine to Module in GlobalMerge

Redirect DataLayout from TargetMachine to Module in GlobalMerge

Summary:
This change is part of a series of commits dedicated to have a single
DataLayout during compilation by using always the one owned by the
module.

Reviewers: echristo

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D10987

From: Mehdi Amini <mehdi.amini@apple.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241615 91177308-0d34-0410-b5e6-96231b3b80d8