BRUSSELS — The EU is scrambling to redo its homework on building a secure supply of microchips after it was forced to accept it has made little progress on tackling its dependence on the U.S. and China. The EU recently dodged a bullet for the second time this year when a weeks-long disruption fueled by trade tensions between the U.S. and China saw European carmakers warn in October that their assembly lines could grind to a halt . That left the bloc reckoning with the reality that its first EU