mongodb: new package

Compiled and tested on arm (beaglebone black), aarch64 (qemu),
i386 (qemu) and x86_64 (qemu).

[Peter: limit to supported archs, disable -Werror]
Signed-off-by: Sergio Prado <sergio.prado@e-labworks.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>