[X86][InstCombine] Move non-X86 specific instcombine test from test/CodeGen/X86/...

diff --git a/llvm/test/CodeGen/X86/vec_udiv_to_shift.ll b/llvm/test/Transforms/InstCombine/vec_udiv_to_shift.ll
similarity index 100%
rename from llvm/test/CodeGen/X86/vec_udiv_to_shift.ll
rename to llvm/test/Transforms/InstCombine/vec_udiv_to_shift.ll