[WSL] "do while" should require a ';' at the end for similarity with C-like languages

[Robin Morisset]

e.g.
int f() {
    int x;
    x = 42;
    do
      x += 3;
    while (false)
    return x;
}
should be refused.

[Myles C. Maxfield]

(In reply to Robin Morisset from comment #0)
> e.g.
> int f() {
>     int x;
>     x = 42;
>     do
>       x += 3;
>     while (false)
>     return x;
> }
> should be refused.

What's the reason for this? Why not make it optional?

[Myles C. Maxfield]

Migrated to https://github.com/gpuweb/WHLSL/issues/118