docker: add hash file

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/docker/docker.hash

@@ -0,0 +1,2 @@
+# Locally calculated
+sha256	47629578e89d96d1541c91d040aec4316f03ad6d01dc3eecb8f82a33445c1e4e	docker-1.5.tar.gz