Snippets for sddm-kcm 6.7.5 from FreeBSD 150arm64

Sourced from https://pkg-status.freebsd.org/ampere5/data/latest-per-pkg/plasma6-sddm-kcm/6.7.5/150arm64-default.log.

• /wrkdirs/usr/ports/deskutils/plasma6-sddm-kcm/work/sddm-kcm-6.7.5/sddmauthhelper.cpp:46:9: warning: ignoring return value of function declared with 'nodiscard' attribute [-Wunused-result]
     46 |         file.open(QIODevice::WriteOnly);
        |         ^~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~