/usr/bin/s390x-linux-gnu-gcov-tool is in gcc-s390x-linux-gnu 4:5.3.1-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/bin/s390x-linux-gnu-gcov-tool-5
/usr/bin/s390x-linux-gnu-gcov-tool-5