Add commit ID to build info

[adielcristo]

This will help checking whether the build is actually being done with the last commit from the language repo.

For context: After removing the invalid IDs to fix the pt_br build, one of them is still referred to as cause of the issue, even when it doesn't exist anymore (nor in doc/en nor in doc/pt_br). The commit ID can be used to check whether the version being built is the correct one, helping to pinpoint the problem.