Merging r278988:

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r278988 | cbieneman | 2016-08-17 14:54:30 -0700 (Wed, 17 Aug 2016) | 14 lines

[Darwin] Stop linking libclang_rt.eprintf.a

Summary:
The eprintf library was added before the general OS X builtins library existed as a place to store one builtin function. Since we have for several years had an actual mandated builtin library for OS X > 10.5, we should just merge eprintf into the main library.

This change will resolve PR28855.

As a follow up I'll also patch compiler-rt to not generate the eprintf library anymore.

Reviewers: ddunbar, bob.wilson

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D23531
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git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_39@279103 91177308-0d34-0410-b5e6-96231b3b80d8