games/linux-steam-utils: update to 20200525
- fix an SDL segfault on exit with the recent Steam client;
- bundle a workaround for FMOD initialization bug described in https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=240043#c26 for FreeBSD 12.1.
PR: 246712
Submitted by: Alex S <iwtcex@gmail.com> (maintainer)