vendor: cadvisor v0.39.0

Main upgrades:
- github.com/opencontainers/runc v1.0.0-rc93
- github.com/containerd/containerd v1.4.4
- github.com/docker/docker v20.10.2
- github.com/mrunalp/fileutils v0.5.0
- github.com/opencontainers/selinux v1.8.0
- github.com/cilium/ebpf v0.2.0

vendor/github.com/cilium/ebpf/.clang-format

@@ -0,0 +1,17 @@
+---
+Language:        Cpp
+BasedOnStyle:    LLVM
+AlignAfterOpenBracket: DontAlign
+AlignConsecutiveAssignments: true
+AlignEscapedNewlines: DontAlign
+AlwaysBreakBeforeMultilineStrings: true
+AlwaysBreakTemplateDeclarations: false
+AllowAllParametersOfDeclarationOnNextLine: false
+AllowShortFunctionsOnASingleLine: false
+BreakBeforeBraces: Attach
+IndentWidth:     4
+KeepEmptyLinesAtTheStartOfBlocks: false
+TabWidth:        4
+UseTab:          ForContinuationAndIndentation
+ColumnLimit:     1000
+...