meta-asrock: catch up with yocto updates

Override variable syntax change, honister compat, and a CONF_VERSION
bump.

Fixes openbmc/openbmc#3816.

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Change-Id: Ia41d159d8118e5dba4b213bb0f7c2d61753c8ad3
diff --git a/meta-asrock/meta-e3c246d4i/conf/local.conf.sample b/meta-asrock/meta-e3c246d4i/conf/local.conf.sample
index 1c86431..fa8e7f0 100644
--- a/meta-asrock/meta-e3c246d4i/conf/local.conf.sample
+++ b/meta-asrock/meta-e3c246d4i/conf/local.conf.sample
@@ -1,7 +1,7 @@
 MACHINE ??= "e3c246d4i"
 DISTRO ?= "openbmc-phosphor"
 PACKAGE_CLASSES ?= "package_rpm"
-SANITY_TESTED_DISTROS_append ?= " *"
+SANITY_TESTED_DISTROS:append ?= " *"
 EXTRA_IMAGE_FEATURES = "debug-tweaks"
 USER_CLASSES ?= "buildstats image-prelink"
 PATCHRESOLVE = "noop"
@@ -14,7 +14,7 @@
     ABORT,${DL_DIR},100M,1K \
     ABORT,${SSTATE_DIR},100M,1K \
     ABORT,/tmp,10M,1K"
-CONF_VERSION = "1"
+CONF_VERSION = "2"
 INHERIT += "extrausers"
 EXTRA_USERS_PARAMS = " \
   usermod -p '\$1\$UGMqyqdG\$FZiylVFmRRfl9Z0Ue8G7e/' root; \