Merging r330189:

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r330189 | whitequark | 2018-04-17 07:52:43 -0700 (Tue, 17 Apr 2018) | 7 lines

[LLVM-C] [PR34633] Avoid calling ->dump() methods from LLVMDump*.

LLVMDump* functions are available in Release builds too.

Patch by Brenton Bostick.

Differential Revision: https://reviews.llvm.org/D44600
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llvm-svn: 331804