nginx: new recipe

Initial recipe created by Steve Arnold.  Original build patch and 1.0.10
recipe graciously contributed by bencoh (in #oe on irc.freenode.net).
New recipe and init script contributed by this author.  Built and
tested on master branches using author's fork of meta-raspberrypi.

Signed-off-by: stephen.arnold42 <stephen.arnold42@gmail.com>
Signed-off-by: Sébastien Mennetrier <s.mennetrier@innotis.org>
Signed-off-by: Khem Raj <raj.khem@gmail.com>