Add xfs support

Packages describing “xfs” as local USE flag

Package “xfs” Flag Description
sys-cluster/ceph Add xfs support
app-metrics/collectd Enable optional capability to filter on XFS file system in df plugin; Requires XFS headers from sys-fs/xfsprogs
app-backup/amanda Support for backing up raw XFS filesystems using xfsdump

All packages providing a “xfs” USE flag (3)