Add generated file checks

[ronald-cron-arm]

Add generated file checks

• Adapt tests/scripts/check-generated-files.sh to work for both mbedtls and TF-PSA-Crypto. Note: TF-PSA-Crypto has less generated files: no error.c, version_features.c, ssl_debug_helpers_generated.c, visualc/VS2013 ... Keep check of all files when called in the context of mbedtls for the time being.
• Add component_check_generated_files all.sh component in tf-psa-crypto/tests/scripts/components-basic-checks.sh.

Note: no make build system, CMake should be used instead

Depends on: Mbed-TLS/mbedtls#9720.

DOD: Same support for generated file checking in TF-PSA-Crypto as in mbedtls.

[ronald-cron-arm]

#91 remains to be reviewed and merged for this issue to be completed.

[gilles-peskine-arm]

Note that in principle, check-generated-files.sh is obsolete: we now solely rely on make generated_files in the CI. We only use check-generated-files.sh for three things:

• To determine which files are generated, in code_style.py. That's a hack, and having an official make list_generated_files would be better.
• In all.sh, but that's only to (partially) check the consistency between the different ways to generate files. If we only have CMake then we don't need that consistency check any longer.
• Sometimes, when preparing release branches, to check that we have up-to-date generated files. But we could rely on make generated_files instead.

CMake has no generated_files target, but it should — it's just that nobody has implemented it yet.

We do however need make_generated_files.bat. That's needed for the CI on Windows (invoked from windows_testing.py).

[gilles-peskine-arm]

The new Coverity push script from Mbed-TLS/mbedtls-test#165 relies on check-generated-files -u. If we change the way to ensure that generated files are present, we'll need to remember to update the Coverity push script.