zephyr-bsp: zephyr parameters update

Update the parameters being run in qemu to get more stable results.
Values taken from zephyr qemu.  Also, use QB_GRAPHICS instead of
QB_OPT_APPEND for the relevant places.

Signed-off-by: Jon Mason <jon.mason@arm.com>
Signed-off-by: Naveen Saini <naveen.kumar.saini@intel.com>

.gitlab-ci.yml

@@ -88,7 +88,8 @@ qemu-cortex-m0:
   extends: .build
   parallel:
     matrix:
-      - TESTING: testimage
+      - TOOLCHAIN: [default, zephyr-toolchain]
+        TESTING: testimage
 
 qemu-cortex-m3:
   extends: .build