Merging r259798, r259835:

Merging r259798, r259835:

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r259798 | nemanjai | 2016-02-04 08:18:08 -0800 (Thu, 04 Feb 2016) | 9 lines

Enable the %s modifier in inline asm template string

This patch corresponds to review:
http://reviews.llvm.org/D16847

There are some files in glibc that use the output operand modifier even though
it was deprecated in GCC. This patch just adds support for it to prevent issues
with such files.
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r259835 | nemanjai | 2016-02-04 14:36:10 -0800 (Thu, 04 Feb 2016) | 3 lines

Provide a test case for rl259798
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_38@259856 91177308-0d34-0410-b5e6-96231b3b80d8