Reorder protobuf compiler command line arguments.

Attempt to chase non-repoducible bug. CL has
changed a command line for protoc and there are rare occasional
crashes on Win32. It could be because of some bug in protoc's parser.
This change restores a command line like before the suspecting CL
only for the most common case with only one proto file in a library.


Cr-Commit-Position: refs/heads/master@{#417544}
1 file changed