try copy libnsl.so to INSTALL_DIR (#3203)

[ti-chi-bot]

This is an automated cherry-pick of #3203

What problem does this PR solve?

Issue Number: close #2752

Problem Summary:

What is changed and how it works?

What's Changed:

• try copy libnsl.so to ${INSTALL_DIR}

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

Release note

Fix the issue that TiFlash fails to start up under platform without library `nsl`

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• solotzg

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[solotzg]

/rebuild

[solotzg]

/rebuild

[solotzg]

/merge

[ti-chi-bot]

@solotzg: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 62712b2