/usr/lib/gcc/arm-linux-gnueabi/4.5.3/libobjc.so is in gobjc-4.5-arm-linux-gnueabi 4.5.3-12ubuntu2cross1.61.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/gcc/arm-linux-gnueabi/4.5.3/../../../../arm-linux-gnueabi/lib/libobjc.so.2