Comments & tests for stat_syscall

[pranav-bhatt]

Description

This PR adds comments and tests for the stat_syscall system call function.

Type of change

• 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)
• This change requires a documentation update

How Has This Been Tested?

For the unit tests added, run ``

• Test A - lind_project/tests/test_cases/test_a.c
• Test B - lind_project/tests/test_cases/test_b.c

Checklist:

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• Any dependent changes have been added to a pull request and/or merged in other modules (native-client, lind-glibc, lind-project)

[yashaswi2000]

Good job with the description, add doc strings to helper functions as well, missing unit tests.

[yashaswi2000]

document the helper function aswell

[pranav-bhatt]

So I have a couple of thoughts here:

1. The helper functions themselves are pretty straightforward since they are just populating fields
2. the definitions of each of those fields and the possible values they can take are pretty long and can lead to over-documentation
3. Adding the definitions of each field is probably out of the scope of the helper functions, and could maybe (but again probably not) be handled in the object definition of the inodes itself instead of here.

A better way here would be to link the man page for inodes. That should provide a better experience for folks and keep things clean IMO.