sysutils/fusefs-libs: update to 2.9.7

• Limit portscout notifications
• Move options after generic defines
• Don't install unconditionally
• Convert IGNORE to IGNORE_${OPSYS}
• Avoid pkg-plist churn on updates

Changes: https://github.com/libfuse/libfuse/releases/tag/fuse-2.9.7
Changes: https://github.com/libfuse/libfuse/releases/tag/fuse-2.9.6
ABI: https://abi-laboratory.pro/tracker/timeline/libfuse/