vendor: update c/common

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

vendor/github.com/opencontainers/cgroups/getallpids.go

@@ -0,0 +1,27 @@
+package cgroups
+
+import (
+	"io/fs"
+	"path/filepath"
+)
+
+// GetAllPids returns all pids from the cgroup identified by path, and all its
+// sub-cgroups.
+func GetAllPids(path string) ([]int, error) {
+	var pids []int
+	err := filepath.WalkDir(path, func(p string, d fs.DirEntry, iErr error) error {
+		if iErr != nil {
+			return iErr
+		}
+		if !d.IsDir() {
+			return nil
+		}
+		cPids, err := readProcsFile(p)
+		if err != nil {
+			return err
+		}
+		pids = append(pids, cPids...)
+		return nil
+	})
+	return pids, err
+}