[X86] Update the test case for v4i1 bitselect in combine-bitselect.ll to not...

[X86] Update the test case for v4i1 bitselect in combine-bitselect.ll to not have an infinite loop in IR.

In fact we don't even need a loop at all. I backed out the bug fix this was testing for and verified that this new case hit the same issue.

This should stop D59626 from deleting some of this code by realizing it was dead due to the loop.

llvm-svn: 357544