Mehdi Amini 515396cd38 Add a module Hash in the bitcode and the combined index, implementing a kind of "build-id"
This is intended to be used for ThinLTO incremental build.

Differential Revision: http://reviews.llvm.org/D18213

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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@265095 91177308-0d34-0410-b5e6-96231b3b80d8
2016-04-01 01:30:06 +00:00
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