protobuf 3.5.2 (new formula)

[npars]

• Have you followed the guidelines for contributing?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing brew install <formula>)?

---

This is just a duplicate of @ilovezfs's implementation for 3.5.1 (located here) upgraded to 3.5.2.

#29295 states that 3.5 was not added due to lack of maintenance but the 3.6.0 release mentions that:

Starting from this release, we now require C++11. For those we cannot yet upgrade to C++11, we will try to keep the 3.5.x branch updated with critical bug fixes only. If you have any concerns about this, please comment on issue protocolbuffers/protobuf#2780.

I feel like that is enough to warrant adding the formula.

[fxcoudert]

We probably want to use this opportunity to sort out the many protobuf versions that we have… [email protected] [email protected] [email protected] + latest.

[fxcoudert]

No test or check option, like current protobuf.rb

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.