NPD v0.8.7 release

Changes: v0.8.6...v0.8.7

CHANGELOG:

• Fix an issue that kubelet may be restarted by NPD health checker unexpectedly (fix: kubernetes/kubernetes#87615),
  Make log pattern check configurable in health checker (#536, @abansal4032)
• Add memory read error (#530, @goushicui)
• Add support for building NPD on MacOS (#529, @stmcginnis)
• Exit the process when there is a timeout in plugin daemon (#521, @ZYecho)
• Add support for containerd health check (#518, @Random-Liu)
• Add metric for per-cpu, per-stage timing (#516, @karangoel)

Docker Image: k8s.gcr.io/node-problem-detector/node-problem-detector:v0.8.7

SHA: 739be1e17a391b5a06f0014bf8dbaf0d03c518d6
MD5: 41bfe82e6ce5183594e43ec609848a81