Allow proto builds to pass in java proto params.

Also source files which have dependencies need to be bundled together
(at least the way the build system is set up now). Move
--proto_path=$(TOP) to the end so that it does not take precedence
over user-supplied --proto_path flags.

Change-Id: Ia532647fe8811d39230a23ba3671685b0388cbe0
3 files changed