Fix some problems in Debian build scripts.

* Mount local Paddle instead of git clone from remote.
* Use official chinese ubuntu source instead of 163 mirror.

paddle/scripts/deb/build_scripts/build.sh

@@ -1,12 +1,12 @@
 #!/bin/bash
 set -e
+apt-get update
 apt-get install -y dh-make
 cd ~
 mkdir -p ~/dist/gpu
 mkdir -p ~/dist/cpu
 mkdir -p ~/dist/cpu-noavx
 mkdir -p ~/dist/gpu-noavx
-git clone https://github.com/baidu/Paddle.git paddle
 cd paddle
 mkdir build
 cd build

paddle/scripts/deb/build_scripts/build_deb.sh

@@ -3,6 +3,6 @@ set -e
 docker build -t build_paddle_deb .
 rm -rf dist
 mkdir -p dist
-docker run -v$PWD/dist:/root/dist --name tmp_build_deb_container build_paddle_deb
+docker run -v$PWD/dist:/root/dist -v $PWD/../../../..:/root/paddle --name tmp_build_deb_container build_paddle_deb
 docker rm tmp_build_deb_container
 docker rmi build_paddle_deb