DEPS.xwalk: Roll v8-crosswalk (3bfc597 -> 11bb7b4)

11bb7b4 Merge pull request #70 from huningxin/simd-m40
24c9667 Merge pull request #72 from rakuco/backport-cpplint-fixes
0a93397 Make cpplint happy.
94010fa [SIMD.js] Implement SIMD128 data load and store APIs
e3ad51e [SIMD.js] Inline all SIMD operations
84282b6 [SIMD.js] Fix the heap unit tests
a1ea579 [SIMD.js] Add SIMD128 types and operations