/usr/lib/gcc-cross/arm-linux-gnueabi/4.7/libmudflap.so is in libmudflap0-4.7-dev-armel-cross 4.7.3-1ubuntu1cross1.81.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/gcc-cross/arm-linux-gnueabi/4.7/../../../../arm-linux-gnueabi/lib/libmudflap.so.0