A return inside a switch doesn't return from a function block

[JeremyGrieshop]

The return true; here should return true from the function, f:

#!/usr/bin/env afw

function f(x) {

    switch (x) {
        case 1:
            return true;
    }

    return false;
}

assert(f(1) === true);

[mike000000000]

Remove skip in /workspaces/afw/src/afw/tests/language/script/switch.as test: switch-return-fn when fixed.