CI: Add meta-secure-core

Meta-secure-core is used to create signed capsule (firmware update
images). This adds meta-secure-core.yml file and since it depends on meta-perl
from oe-core, it adds that layer to meta-openembedded.yml

Signed-off-by: Emekcan Aras <emekcan.aras@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>

ci/meta-openembedded.yml

@@ -9,3 +9,4 @@ repos:
       meta-networking:
       meta-oe:
       meta-python:
+      meta-perl:

ci/meta-secure-core.yml

@@ -0,0 +1,11 @@
+header:
+  version: 14
+
+repos:
+  meta-secure-core:
+    url: https://github.com/Wind-River/meta-secure-core.git
+    layers:
+      meta:
+      meta-signing-key:
+      meta-efi-secure-boot:
+