Fix the presubmit step

- Fix the runtime function test auto generation.
- Fix the coding style issues.

TODO(ningxin): squash into patch 1

Conflicts:
	tools/generate-runtime-tests.py
Inline the simd128-tag

Implement the simd128-tag inlining for the new JSObject-based
SIMD128 types' layout.

TODO(ningxin): squash into patch-2
Fix invalid native context reference in simd128-tag

The solution is to inline the native context load.

BUG=XWALK-2255
fix check code error