This commit checks-in all the specification test cases for v2 Wasm spec, including SIMD. Currently, we do not run the tests actually as we need to fix several places to pass spectests plus we haven't implemented SIMD yet. I wanted to have this PR separate from removing post1_0 tests and fixes as that would make it impossible for reviews to review on the actual code. Signed-off-by: Takeshi Yoneda takeshi@tetrate.io