[apache/incubator-teaclave] fix protected_fs::rename_meta and get_current_meta_gmac: add mutex sync (#336)

[volcano <no...@github.com>]

protected_fs::rename_meta and get_current_meta_gmac missing mutex synchronization protection.

## Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context.

Fixes # (issue)

## Type of change (select or add applied and delete the others)

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
- [ ] API change with a documentation update
- [ ] Additional test coverage
- [ ] Code cleanup or just sync with upstream third-party crates

## How has this been tested?

## Checklist

- [ ] Fork the repo and create your branch from `master`.
- [ ] If you've added code that should be tested, add tests.
- [ ] If you've changed APIs, update the documentation.
- [ ] Ensure the tests pass (see CI results).
- [ ] Make sure your code lints/format.

You can view, comment on, or merge this pull request online at:

  https://github.com/apache/incubator-teaclave/pull/336

-- Commit Summary --

  * fix protected_fs::rename_meta and get_current_meta_gmac: add mutex synchronization

-- File Changes --

    M common/protected_fs_rs/protected_fs_c/sgx_tprotected_fs/file_other.cpp (19)

-- Patch Links --

https://github.com/apache/incubator-teaclave/pull/336.patch
https://github.com/apache/incubator-teaclave/pull/336.diff

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Re: [apache/incubator-teaclave] fix protected_fs::rename_meta and get_current_meta_gmac: add mutex sync (#336)

[Mingshen Sun <no...@github.com>]

Merged #336 into master.

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