vendor: upgrade Prometheus dependencies

Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>

cmd/vendor/github.com/prometheus/procfs/xfs/parse.go

@@ -17,7 +17,6 @@ import (
 	"bufio"
 	"fmt"
 	"io"
-	"log"
 	"strconv"
 	"strings"
 )
@@ -273,7 +272,6 @@ func vnodeStats(us []uint32) (VnodeStats, error) {
 	// stats versions.  Therefore, 7 or 8 elements may appear in
 	// this slice.
 	l := len(us)
-	log.Println(l)
 	if l != 7 && l != 8 {
 		return VnodeStats{}, fmt.Errorf("incorrect number of values for XFS vnode stats: %d", l)
 	}

cmd/vendor/github.com/prometheus/procfs/xfs/xfs.go

@@ -22,6 +22,11 @@ package xfs
 // kernel source. Most counters are uint32s (same data types used in
 // xfs_stats.h), but some of the "extended precision stats" are uint64s.
 type Stats struct {
+	// The name of the filesystem used to source these statistics.
+	// If empty, this indicates aggregated statistics for all XFS
+	// filesystems on the host.
+	Name string
+
 	ExtentAllocation   ExtentAllocationStats
 	AllocationBTree    BTreeStats
 	BlockMapping       BlockMappingStats