Add ulimit to docker build.

Signed-off-by: Lei Jitang <leijitang@huawei.com>

contrib/completion/bash/docker

@@ -395,7 +395,7 @@ _docker_build() {
 
 	case "$cur" in
 		-*)
-			COMPREPLY=( $( compgen -W "--cgroup-parent --cpuset-cpus --cpuset-mems --cpu-shares -c --cpu-period --cpu-quota --file -f --force-rm --help --memory -m --memory-swap --no-cache --pull --quiet -q --rm --tag -t" -- "$cur" ) )
+			COMPREPLY=( $( compgen -W "--cgroup-parent --cpuset-cpus --cpuset-mems --cpu-shares -c --cpu-period --cpu-quota --file -f --force-rm --help --memory -m --memory-swap --no-cache --pull --quiet -q --rm --tag -t --ulimit" -- "$cur" ) )
 			;;
 		*)
 			local counter="$(__docker_pos_first_nonflag '--cgroup-parent|--cpuset-cpus|--cpuset-mems|--cpu-shares|-c|--cpu-period|--cpu-quota|--file|-f|--memory|-m|--memory-swap|--tag|-t')"

docs/reference/commandline/build.md

@@ -28,6 +28,7 @@ weight=1
       --cpuset-mems=""         MEMs in which to allow execution, e.g. `0-3`, `0,1`
       --cpuset-cpus=""         CPUs in which to allow execution, e.g. `0-3`, `0,1`
       --cgroup-parent=""       Optional parent cgroup for the container
+      --ulimit=[]              Ulimit options
 
 Builds Docker images from a Dockerfile and a "context". A build's context is
 the files located in the specified `PATH` or `URL`. The build process can refer
@@ -247,3 +248,6 @@ When `docker build` is run with the `--cgroup-parent` option the containers
 used in the build will be run with the [corresponding `docker run`
 flag](/reference/run/#specifying-custom-cgroups). 
 
+Using the `--ulimit` option with `docker build` will cause each build step's 
+container to be started using those [`--ulimit`
+flag values](/reference/run/#setting-ulimits-in-a-container).

man/docker-build.1.md

@@ -22,6 +22,7 @@ docker-build - Build a new image from the source code at PATH
 [**--cpuset-cpus**[=*CPUSET-CPUS*]]
 [**--cpuset-mems**[=*CPUSET-MEMS*]]
 [**--cgroup-parent**[=*CGROUP-PARENT*]]
+[**--ulimit**[=*[]*]]
 
 PATH | URL | -
 
@@ -142,6 +143,12 @@ two memory nodes.
   If the path is not absolute, the path is considered relative to the `cgroups` path of the init process.
 Cgroups are created if they do not already exist.
 
+**--ulimit**=[]
+  Ulimit options
+
+  For more information about `ulimit` see [Setting ulimits in a 
+container](https://docs.docker.com/reference/commandline/run/#setting-ulimits-in-a-container)
+
 # EXAMPLES
 
 ## Building an image using a Dockerfile located inside the current directory