poky: Switch to post release name/version

(From meta-yocto rev: 14bb7405a52ebe25fb4e0e8ffd6f986e43741a57)

Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-poky/conf/distro/poky.conf

@@ -1,7 +1,7 @@
 DISTRO = "poky"
 DISTRO_NAME = "Poky (Yocto Project Reference Distro)"
-DISTRO_VERSION = "3.0"
-DISTRO_CODENAME = "zeus"
+DISTRO_VERSION = "3.0+snapshot-${DATE}"
+DISTRO_CODENAME = "master"
 SDK_VENDOR = "-pokysdk"
 SDK_VERSION = "${@d.getVar('DISTRO_VERSION').replace('snapshot-${DATE}', 'snapshot')}"