Update CuDNN and NCCL2 versions. (#214)

Author: Qi Qiao

docker/1.13.1/Dockerfile.gpu

@@ -12,11 +12,11 @@ RUN apt-get update && apt-get install -y --no-install-recommends --allow-unauthe
         cuda-cusolver-dev-10-0 \
         cuda-cusparse-dev-10-0 \
         curl \
-        libcudnn7=7.4.1.5-1+cuda10.0 \
+        libcudnn7=7.5.1.10-1+cuda10.0 \
         # TensorFlow doesn't require libnccl anymore but Open MPI still depends on it
-        libnccl2=2.3.5-2+cuda10.0 \
+        libnccl2=2.4.7-1+cuda10.0 \
         libgomp1 \
-        libnccl-dev=2.3.5-2+cuda10.0 \
+        libnccl-dev=2.4.7-1+cuda10.0 \
         libfreetype6-dev \
         libhdf5-serial-dev \
         libpng12-dev \