Adds bazel project opencensus-cpp

[catenacyber]

@g-easy would you be interested in continuous fuzzing for opencensus-cpp ?
This PR enables it with oss-fuzz with your fuzz targets.
It changes a bit the Basel build system to use https://github.com/bazelbuild/rules_fuzzing and https://google.github.io/oss-fuzz/getting-started/new-project-guide/bazel/ cf

cc @stefanbucur could cc_fuzz_test support corpus like it is used here https://github.com/census-instrumentation/opencensus-cpp/blob/ba631066779a534267fdb1321b19850eb2b0c000/opencensus/tags/BUILD#L194

[stefanbucur]

cc @stefanbucur could cc_fuzz_test support corpus like it is used here https://github.com/census-instrumentation/opencensus-cpp/blob/ba631066779a534267fdb1321b19850eb2b0c000/opencensus/tags/BUILD#L194

Yes, cc_fuzz_test already supports the corpus attribute in the same way: https://github.com/bazelbuild/rules_fuzzing/blob/master/docs/guide.md#specifying-seed-corpora

[g-easy]

Nice! Thanks for taking care of this.

[catenacyber]

@g-easy I would need one (or more) mail for you to get the report about bugs
Could you provide one ?
This email address should be associated with a google account to access the detailed report

[g-easy]

@jsuereth - what would you suggest re: email address?

[jsuereth]

sorry for delay, was out for a bit. [email protected] would be ideal for us.

[oliverchang]

LGTM with a comment about the email

[oliverchang]

Unfortunately the "+" breaks the auth for ClusterFuzz here, even if this was an email associated with an individual google account. In this case though this looks like a mailing list so it's unlikely to work anyway.

@jsuereth could you please suggest other individual emails to add here? Filtering these emails should be easy.

[jsuereth]

You can use [email protected] for now then.

[asraa]

friendly ping @jsuereth