print error message when fsck failed

[andyzhangx]

What type of PR is this?

/kind bug

What this PR does / why we need it:

print error msg when fsck failed
in some corner case, fsck failed due to disk is corrupted, while there is no fsck error msg in the logs which makes it difficult to troubleshooting such case

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

/assign @jsafrane
/priority important-soon
/sig storage
/triage accepted

Does this PR introduce a user-facing change?

none

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

none

[andyzhangx]

/assign @msau42

[andyzhangx]

@jingxu97 @msau42 could you approve? that's just one more logging which could indicate whether fsck failure due to broken disk, it's rare case while we hit such issue once.

[jingxu97]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andyzhangx, jingxu97

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• staging/src/k8s.io/mount-utils/OWNERS [jingxu97]

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