Vendor in files for runc/libcontainer

vndr was previously removing .go files in runc/libcontainer since they weren't used anywhere
in cri-o, but kpod stats will use them

Signed-off-by: Ryan Cole <rcyoalne@gmail.com>

vendor/github.com/opencontainers/runc/libcontainer/stats_linux.go

@@ -0,0 +1,8 @@
+package libcontainer
+
+import "github.com/opencontainers/runc/libcontainer/cgroups"
+
+type Stats struct {
+	Interfaces  []*NetworkInterface
+	CgroupStats *cgroups.Stats
+}