Shared memory text syntax

[binji]

@dschuff Should've listened to you earlier. :-) Just recently added this to the spec interpreter, and @rossberg suggested your original syntax: see WebAssembly/threads#74

So it should look like this:

(memory 1 1 shared)

[dschuff]

Heh, ok. I don't have a strong opinion on that, I'll change it back if that's what goes in the spec. Related (and to WebAssembly/threads#76) I do also like the idea of adding "atomic" to wait and wake.

[binji]

Well, I already landed it in wabt: WebAssembly/wabt#661