Read Dockerfile from stdin

[wangkuiyi]

Currently, in tools/manylinux1/build_all.sh we have

Paddle/tools/manylinux1/build_all.sh

Lines 9 to 10 in df9c13a

	docker build -t ${REPO}/paddle_manylinux_devel:cuda7.5_cudnn5 -f Dockerfile.tmp .
	docker push ${REPO}/paddle_manylinux_devel:cuda7.5_cudnn5

This code snippet creates temporary Dockerfiles in /tmp. However, on some special environment, e.g., some managed VMs, we might not have permission to write to /tmp. A solution is to make docker build read the Dockerfile content from the stdin. For more details, please refer to https://docs.docker.com/engine/reference/commandline/build/. The shortcut is

docker build - < Dockerfile

[wangkuiyi]

moby/moby#19197 (comment)