Move test to X86 dir

Test is platform independent, but I don't want to force vector-width, or
that could spoil the pragma test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196539 91177308-0d34-0410-b5e6-96231b3b80d8

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