DEPS.xwalk: Roll v8-crosswalk (5e109ca -> 9b7376c).

9b7376c Merge pull request #54 from huningxin/fix_mark_compact
2f3f719 Fix invalid object access in SIMD types after heap mark compact.
Merge pull request #2438 from huningxin/master

DEPS.xwalk: Roll v8-crosswalk (5e109ca -> 9b7376c).