Remove the baseline files from the make dist file list.
Remove the baseline files from the make dist file list.

https://github.com/google/protobuf/pull/1762 remove the files, but I forgot to
update Makefile.am to remove them.

google/protobuf,google/protobuf,google/protobuf,Livefyre/protobuf,google/protobuf,google/protobuf,google/protobuf,Livefyre/protobuf,Livefyre/protobuf,Livefyre/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,Livefyre/protobuf