meta-google: distro: override EXTENDED_VERSION

This variable is set by default based on the latest tag, but this
doesn't work in Google's environment. Set it to be the same as
DISTRO_VERSION instead, which is based on a version variable passed in
from the environment.

Tested: Built for kudo and examined os-release
Signed-off-by: Benjamin Fair <benjaminfair@google.com>
Change-Id: Ib9acabae57ed69f4d32f0256f8425923039f4a8a
diff --git a/meta-google/conf/distro/gbmc.conf b/meta-google/conf/distro/gbmc.conf
index 91e3e9e..0f2531a 100644
--- a/meta-google/conf/distro/gbmc.conf
+++ b/meta-google/conf/distro/gbmc.conf
@@ -5,6 +5,7 @@
 DISTRO = "gbmc"
 DISTRO_NAME = "gBMC (OpenBMC + Google customizations)"
 DISTRO_VERSION = "gbmc-release-${GBMC_VERSION}"
+EXTENDED_VERSION = "${DISTRO_VERSION}"
 DISTROOVERRIDES .= ":gbmc"
 
 # Possible values: "dev", "prod"