llvm/test/CodeGen/X86/peephole-multiple-folds.ll: Relax expressions to satisfy win32.
Revert r205551, "Attempt to XFAIL this on mingw and cygwin hosts." It didn't fail on cygming.

That said, it emits errors to the stderr (with exit(0));

  error: failed to compute relocation: IMAGE_REL_I386_SECREL
  error: failed to compute relocation: IMAGE_REL_I386_SECREL
  error: failed to compute relocation: IMAGE_REL_I386_SECREL
  error: failed to compute relocation: IMAGE_REL_I386_SECREL
  error: failed to compute relocation: IMAGE_REL_I386_SECREL
  error: failed to compute relocation: IMAGE_REL_I386_DIR32
  error: failed to compute relocation: IMAGE_REL_I386_SECREL
  error: failed to compute relocation: IMAGE_REL_I386_DIR32
  error: failed to compute relocation: IMAGE_REL_I386_SECREL
  error: failed to compute relocation: IMAGE_REL_I386_SECREL
  error: failed to compute relocation: IMAGE_REL_I386_DIR32