CI: make qemuarm-secureboot builds more thorough

Build all the things that qemuarm64-secureboot builds, removing those
that fail to compile.  Unfortunately, musl doesn't play nicely with
optee-test.

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

.gitlab-ci.yml

@@ -191,7 +191,8 @@ qemuarm-secureboot:
   extends: .build
   parallel:
     matrix:
-      - TESTING: testimage
+      - TOOLCHAINS: [gcc, clang]
+        TESTING: testimage
 
 qemuarm:
   extends: .build

ci/qemuarm-secureboot.yml

@@ -4,3 +4,9 @@ header:
     - ci/base.yml
 
 machine: qemuarm-secureboot
+
+target:
+  - core-image-base
+  - optee-examples
+  - optee-test
+  - optee-os-tadevkit