poky.conf: DISTRO_VERSION bump

We missed the DISTRO_VERSION bump for the 1.6.3 release. I've opened
https://bugzilla.yoctoproject.org/show_bug.cgi?id=7836 to
ensure that this doesn't happen again.

(From meta-yocto rev: d1dea3bd544788aaec977908c5d0ca1f0e6d9e56)

Signed-off-by: Beth Flanagan <elizabeth.flanagan@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-yocto/conf/distro/poky.conf

@@ -1,6 +1,6 @@
 DISTRO = "poky"
 DISTRO_NAME = "Poky (Yocto Project Reference Distro)"
-DISTRO_VERSION = "1.6.2"
+DISTRO_VERSION = "1.6.3"
 DISTRO_CODENAME = "daisy"
 SDK_VENDOR = "-pokysdk"
 SDK_VERSION := "${@'${DISTRO_VERSION}'}"