Semicolons are erroneously allowed in inline assembly

[axic]

Examples:
In std:

        | 0 => assembly { res := mstore(add(loc, mul(iw, 32)), vw); }

In dispatch:

  assembly {
    let sel := shr(224, calldataload(0));
    res := eq(sel, candidate);
  }

When translated to the output Yul these semicolons are removed, so it does compile there. Not sure if this is intended or not.

[rodrigogribeiro]

This is intentional: The use of semicolons is just to avoid ambiguities and to keep the grammar as simple as possible in the sol-core parser.

Probably, we will change the LALR parser to a parser combinator-based one to allow better error messages.