The release date is moving on Pyro. Added a new variable that I
set to "May 2018" for the release date. This way if it pushes past
May, I just need to update poky.ent.
(From yocto-docs rev: 928c6a2bf1c31e3819ec33e09bec6c69e2ccea76)
Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>