/usr/lib/gcc-cross/arm-linux-gnueabihf/4.7/libmudflapth.so is in libmudflap0-4.7-dev-armhf-cross 4.7.3-7ubuntu3cross1.84.
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/libmudflapth.so.0