nginx: add hash file

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

package/nginx/nginx.hash

@@ -0,0 +1,2 @@
+# Locally calculated after checking pgp signature
+sha256	b5608c2959d3e7ad09b20fc8f9e5bd4bc87b3bc8ba5936a513c04ed8f1391a18	nginx-1.6.2.tar.gz