/usr/lib/arm-none-eabi/bin/objcopy is in binutils-arm-none-eabi 2.27-9ubuntu1+9.
This file is owned by root:root, with mode 0o755.
It is a symlink to /usr/lib/arm-none-eabi/bin/./usr/bin/arm-none-eabi-objcopy
/usr/lib/arm-none-eabi/bin/./usr/bin/arm-none-eabi-objcopy