[Gradle] Add HDR histogram as a dependency in more modules (needed later).  Add generated source directories to the build so we don't see errors in the GPRC module.
[Gradle] Add HDR histogram as a dependency in more modules (needed later).  Add generated source directories to the build so we don't see errors in the GPRC module.

real-logic/benchmarks,real-logic/benchmarks,real-logic/benchmarks