tools: update check_os_api_parity.v

[ttytm]

The PR does required maintenance work on the check_os_api_parity tool.

[ttytm]

Thanks for the reviewing work!

I had a tiny mistake in there, I didn't manged to push:

- summary := 'Different APIs found for module: `${m}`, between OS base: `${base_os}` and OS: `${api_os}`'
+ summary := 'Different APIs found for module: `${m}`, between OS base: `${base_os}` and OS: `${oname}`'

Should be oname in the print.Should be oname in the print.
You can update locally and check the output when running the tool.