Add oci-create-layer man pages

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

cmd/oci-create-layer/oci-create-layer.1.md

@@ -0,0 +1,30 @@
+% OCI(1) OCI-CREATE-LAYER User Manuals
+% OCI Community
+% October 2016
+# NAME 
+oci-create-layer \- Create filesystem changeset
+
+# SYNOPSIS
+**oci-create-layer** [child] [parent] [flags]
+
+# DESCRIPTION
+`oci-create-layer` creates a filesystem changeset from two layers. It compares child with parent and generates a filsystem diff, pack the diff into a uncompressed tar archive. The output tar archive name is the child name with .tar suffix by default, use `--dest` to specify a custom one.
+
+# OPTIONS
+**--help**
+  Print usage statement
+
+**--dest**
+The dest specify a particular filename where the layer write to
+
+# EXAMPLES
+```
+$ oci-create-layer rootfs-1-s rootfs-1
+$ ls 
+rootfs-1  rootfs-1-s  rootfs-1-s.tar
+
+```
+
+# HISTORY
+Oct 2016, Originally compiled by Lei Jitang (coolljt0725 at huawei dot com)
+