generic/{274,315}: Require falloc -k support

These test cases require filesystem support for FALLOC_FL_KEEP_SIZE
flag in fallocate().

Signed-off-by: Rostislav Skudnov <rostislav@tuxera.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
2 files changed