CI: Add zephyr testimage

Add the ability to run testimage against zephyr machines.
Unfortunately, this exposes a bug in meta-zephyr with TESTIMAGE_AUTO not
working correctly.  So, work around this until it can be fixed upstream.
Also, qemu-cortex-a53 does not successfully pass any of the tests it
successfully builds.  So, don't run testimage until that can be
addressed.

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

.gitlab-ci.yml

@@ -37,6 +37,17 @@ stages:
     - kas build $KASFILES
     - ./ci/check-warnings $KAS_WORK_DIR/build/warnings.log
 
+# Workaround for Zephyr not currectly handling TESTIMAGE_AUTO
+.build_and_test:
+  extends: .setup
+  script:
+    - KASFILES=$(./ci/jobs-to-kas $CI_JOB_NAME)
+    - kas shell --update --force-checkout $KASFILES -c 'cat conf/*.conf'
+    - kas build $KASFILES
+    - kas build $KASFILES -c testimage
+    - ./ci/check-warnings $KAS_WORK_DIR/build/warnings.log
+
+
 #
 # Prep stage, update repositories once
 #
@@ -130,8 +141,8 @@ juno:
 juno/clang:
   extends: .build
 
-microbit-v1:
-  extends: .build
+microbit-v1/testimage-zephyr:
+  extends: .build_and_test
 
 musca-b1:
   extends: .build
@@ -148,6 +159,9 @@ n1sdp/armgcc:
 qemu-cortex-a53:
   extends: .build
 
+qemu-cortex-m3/testimage-zephyr:
+  extends: .build_and_test
+
 qemu-cortex-r5:
   extends: .build