Selector functions

[emesare]

When it comes time to add more static libs that might be more niche and less broad, one might want to forbid matching unless specific functions are found, these would be "selector" functions that enable the rest of the dataset to be matched on. The idea would be to add another optional entry to the Function table called "selector" which can be as simple as a boolean value, or in case we want to encode more assumptions like chained selectors (think: function matches because of function existing elsewhere) some table called "Selector".