[LV] Move test/Transforms/LoopVectorize/pr23997.ll

Summary:
This fixes a build break with r331269.

test/Transforms/LoopVectorize/pr23997.ll

should be in:

test/Transforms/LoopVectorize/X86/pr23997.ll

llvm-svn: 331281

diff --git a/llvm/test/Transforms/LoopVectorize/pr23997.ll b/llvm/test/Transforms/LoopVectorize/X86/pr23997.ll
similarity index 100%
rename from llvm/test/Transforms/LoopVectorize/pr23997.ll
rename to llvm/test/Transforms/LoopVectorize/X86/pr23997.ll