Merging r310262:

Merging r310262:
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r310262 | sdardis | 2017-08-07 08:37:57 -0700 (Mon, 07 Aug 2017) | 9 lines

[DebugInfo][DWARF] Correct some usages of PRIx32 to PRIx64

These lead to tests failing spuriously as the values after being rendered to a
string were incorrect.

Reviewers: clayborg

Differential Revision: https://reviews.llvm.org/D36319

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_50@311196 91177308-0d34-0410-b5e6-96231b3b80d8