/usr/lib/libboinc_opencl.so.7 is in boinc-dev 7.0.24+dfsg-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libboinc_opencl.so.7.0.24
/usr/lib/libboinc_opencl.so.7.0.24