patch for deis/deis to create a swap file

user-data.example.diff

diff --git a/contrib/coreos/user-data.example b/contrib/coreos/user-data.example
index 59f4f46..f8ed383 100644
--- a/contrib/coreos/user-data.example
+++ b/contrib/coreos/user-data.example
@@ -24,6 +24,31 @@ coreos:
       command: start
     - name: fleet.service
       command: start
+    - name: swapon.service
+      command: start
+      enable: true
+      content: |
+        [Unit]
+        Description=Turn on swap
+
+        [Service]
+        Type=oneshot
+        Environment="SWAPFILE=/4GiB.swap"
+        RemainAfterExit=true
+        ExecStartPre=/usr/bin/touch ${SWAPFILE}
+        ExecStartPre=/usr/bin/fallocate -l 4096m ${SWAPFILE}
+        ExecStartPre=/usr/bin/chmod 600 ${SWAPFILE}
+        ExecStartPre=/usr/sbin/mkswap ${SWAPFILE}
+        ExecStartPre=/usr/sbin/losetup -f ${SWAPFILE}
+        ExecStart=/usr/bin/sh -c "/sbin/swapon $(/usr/sbin/losetup -j ${SWAPFILE} | /usr/bin/cut -d : -f 1)"
+        ExecStop=/usr/bin/sh -c "/sbin/swapoff $(/usr/sbin/losetup -j ${SWAPFILE} | /usr/bin/cut -d : -f 1)"
+        ExecStopPost=/usr/bin/sh -c "/usr/sbin/losetup -d $(/usr/sbin/losetup -j ${SWAPFILE} | /usr/bin/cut -d : -f 1)"
+
+        [Install]
+        WantedBy=multi-user.target
+
+        [X-Fleet]
+        Global=true
     - name: docker-tcp.socket
       command: start
       enable: true