DEPS.xwalk: Roll v8-crosswalk (360260f -> 5e109ca).

5e109ca Merge pull request #53 from huningxin/simd-m38
eb36fe8 Add the 1 argument constructor for SIMD types.
dd6d97c Implement SIMD.float32x4.select API.
f076a83 Change the name of conversion functions according to spec.
d1ce961 Change JS function names in simd128.js to JS prefix.