By Gabriela Baczynska and Sabine Siebold BRUSSELS (Reuters) -EU states agreed to freeze any European assets of Russian President Vladimir Putin and his foreign minister on Friday, as Ukraine’s leader pleaded for faster and more forceful action to punish Russia’s invasion of his country. The move against Putin and his top diplomat Sergei Lavrov came as envoys of the EU’s 27 member states thrashed out the details of a new wave of measures – the second – which was backed by the leaders at an emergency summit on Thursday night. “It’s a politically important signal,” said a senior EU diplomat, refe…