[WebAssembly] Update extending load test for new i1 behavior

r284611 changed the behavior of the DAG legalizer for sign-extending i1
values. Update the wasm extending load test to match.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284677 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed