CI: build optee-spdevkit for qemuarm64

To ensure that optee-spdevkit works in all configurations, but it in the
CI for qemuarm64 not just corstone1000.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>

ci/qemuarm64-secureboot.yml

@@ -15,3 +15,5 @@ target:
   - perf
   - optee-examples
   - optee-test
+  - optee-spdevkit
+  - optee-os-tadevkit