/usr/lib/gcc/arm-linux-gnueabi/4.6/liblto_plugin.so is in cpp-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/liblto_plugin.so.0.0.0