LONDON (Reuters) - British finance minister Sajid Javid is aiming to roughly double the country's underlying rate of economic growth after it leaves the European Union, but will not champion big manufacturing sectors that want to stick to EU rules.In an interview with the Financial Times before he travels to meet business leaders in Davos, Switzerland, Javid said Britain would not commit to sticking to EU rules in post-Brexit trade talks - something many businesses want to ease cross-border..