[WebAssembly] Fix debug info tests after r338437.

After r338437, debug_ranges are no longer emitted. Previously, this was only
done for DWARF version 5 and above.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338448 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed