upgrade version of nginx included in omnibus install
upgrade version of nginx included in omnibus install

Addresses CVE-2016-4450

Closes #1705

Signed-off-by: Robb Kidd <11cd4f9ba93acb67080ee4dad8d03929f9e64bf2@chef.io>

chef/supermarket,chef/supermarket,robbkidd/supermarket,robbkidd/supermarket,chef/supermarket,robbkidd/supermarket,chef/supermarket,robbkidd/supermarket,chef/supermarket