protobuf: Exclude new javalite artifact name
protobuf: Exclude new javalite artifact name

In 48929c4 the protobuf lite artifact name changed from protobuf-lite to
protobuf-javalite. However, the exclusion in grpc-protobuf was missed in the
update, allowing protobuf lite to leak into the classpath. This restores the
previous behavior of only having one protobuf implementation on the classpath.

ejona86/grpc-java,dapengzhang0/grpc-java,ejona86/grpc-java,ejona86/grpc-java,dapengzhang0/grpc-java,ejona86/grpc-java,grpc/grpc-java,stanley-cheung/grpc-java,stanley-cheung/grpc-java,stanley-cheung/grpc-java,dapengzhang0/grpc-java,stanley-cheung/grpc-java,grpc/grpc-java,grpc/grpc-java,dapengzhang0/grpc-java,grpc/grpc-java