Improve logging in scriptlets — save reference to console #546

Currently if website overrides console.log or other properties then logging does not work.

Steps to reproduce:

1. Add to user rules:

example.org#%#//scriptlet('prevent-setTimeout')
example.org#%#//scriptlet('log-on-stack-trace', 'document.querySelectorAll')

2. Go to - https://example.org/
3. Run in console:

const noopFunc = ()=>{};
console.log = console.table = noopFunc;
setTimeout(()=>{const ads = {};});
const adblock = ()=>{ document.querySelectorAll('p'); };
adblock();

Scriptlets should log information to console.
There is nothing in console because console.log and console.table have been overridden.

It works fine if console.log = console.table = noopFunc; is commented out.