gjkim42: vendor: update cAdvisor to v0.38.7

JobBuild
98042
01-14 01:47
3c04340c
01-14 01:46
pull-kubernetes-bazel-build 1349533247591157760
pull-kubernetes-bazel-test 1349533247616323584
pull-kubernetes-conformance-kind-ga-only-parallel 1349533247771512832
pull-kubernetes-dependencies 1349533247637295104
pull-kubernetes-e2e-gce-100-performance 1349533247826038784
pull-kubernetes-e2e-gce-ubuntu-containerd 1349533247666655232
pull-kubernetes-e2e-kind 1349533247721181184
pull-kubernetes-e2e-kind-ipv6 1349539288403939328 1349533247746347008
pull-kubernetes-integration 1349533247687626752
pull-kubernetes-node-e2e 1349533247796678656
pull-kubernetes-typecheck 1349533248409047040
pull-kubernetes-verify 1349533250090962944
pull-kubernetes-verify-govet-levee 1349533249252102144