解决部分操作系统上 platformVersion 为空导致的显示问题

[ideal]

例如archlinux，显示的是：arch-

What this PR does / why we need it?

To fix displaying problem of Platform version when platformVersion is empty.

Summary of your change

Check if platformVersion is empty.

Please indicate you've done the following:

• Made sure tests are passing and test coverage is added if needed.
• Made sure commit message follow the rule of Conventional Commits specification.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed.

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[f2c-ci-robot]

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[wanghe-fit2cloud]

感谢支持。