/usr/lib/gcc-cross/arm-linux-gnueabihf/4.7/libobjc.so is in libobjc-4.7-dev-armhf-cross 4.7.3-11ubuntu1cross1.85.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/gcc-cross/arm-linux-gnueabihf/4.7/../../../../arm-linux-gnueabihf/lib/libobjc.so.4