/usr/lib/gcc-cross/arm-linux-gnueabi/4.9.3 is in gcc-4.9-arm-linux-gnueabi-base 4.9.3-13ubuntu2cross1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/gcc-cross/arm-linux-gnueabi/4.9
/usr/lib/gcc-cross/arm-linux-gnueabi/4.9