/usr/lib/gcc/arm-linux-gnueabi/4.6/libobjc.so is in gobjc-4.6-arm-linux-gnueabi 4.6.3-1ubuntu5cross1.62.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/gcc/arm-linux-gnueabi/4.6/../../../../arm-linux-gnueabi/lib/libobjc.so.3