Use google-protobuf 3.2.0.1

This sub-patch release extends support in pre-compiled libraries down to glibc 2.12.

https://github.com/google/protobuf/issues/2783

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/29084

Gemfile.lock

@@ -304,7 +304,7 @@ GEM
       multi_json (~> 1.10)
       retriable (~> 1.4)
       signet (~> 0.6)
-    google-protobuf (3.2.0)
+    google-protobuf (3.2.0.1)
     googleauth (0.5.1)
       faraday (~> 0.9)
       jwt (~> 1.4)