nginx: new package

nginx module selection is, by default, the same as the one sets by
upstream configure script.

Patches improving the cross-compilation support have already been sent
upstream for integration [1-4].

Fixes bug: #3427 [5]

[1] http://mailman.nginx.org/pipermail/nginx-devel/2014-May/005292.html
[2] http://mailman.nginx.org/pipermail/nginx-devel/2014-May/005290.html
[3] http://mailman.nginx.org/pipermail/nginx-devel/2014-May/005291.html
[4] http://mailman.nginx.org/pipermail/nginx-devel/2014-May/005293.html
[5] https://bugs.uclibc.org/show_bug.cgi?id=3427

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Cc: Daniele Salvatore Albano <info@daccii.it>
Cc: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>