kas: microbit-v1 testing

Change-Id: I8043c7be32a1e4029e73c3c9f603ae77c78ddf3c
Signed-off-by: Jon Mason <jon.mason@arm.com>

.gitlab-ci.yml

@@ -79,6 +79,9 @@ juno:
 juno/clang:
   extends: .build
 
+microbit-v1:
+  extends: .build
+
 musca-b1:
   extends: .build
 

kas/microbit-v1.yml

@@ -0,0 +1,10 @@
+header:
+  version: 9
+  includes:
+    - base.yml
+    - meta-zephyr.yml
+
+machine: microbit-v1
+
+target:
+  - zephyr-philosophers