Add layer meta-stx-oran and distro poky-stx-oran

meta-stx will be replaced by meta-stx-oran after changing to
use meta-starlingx as the base layer, and only oran specific
contents like distro and release info, fixes for issue only
happened in oran, and etc.

And add distro 'poky-stx-oran' so that we can have different disto
configs for ORAN specific.

Issue-ID: INF-213

Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
Change-Id: I3d8c609d99b3516b7a75f21e44327f1236eeddc5
diff --git a/scripts/configs/local-stx.conf b/scripts/configs/local-stx.conf
index 0e6a3d6..ef61cf3 100644
--- a/scripts/configs/local-stx.conf
+++ b/scripts/configs/local-stx.conf
@@ -2,7 +2,7 @@
 # Configs for StarlingX #
 #########################
 
-DISTRO = "poky-stx"
+DISTRO = "poky-stx-oran"
 MACHINE = "@BSP@"
 PREFERRED_PROVIDER_virtual/kernel = "linux-yocto-rt"