tests: Add opt testing for linalg examples

.github/workflows/examples.yml

@@ -74,7 +74,8 @@ jobs:
 
     - name: Linear algebra example
       run: |
-        python examples/misc/linalg.py mat-vec mat-mat-sum transpose-mat-vec
+        python examples/misc/linalg.py mat-vec mat-mat mat-mat-sum transpose-mat-vec
+        python examples/misc/linalg.py mat-vec -o mat-mat -o mat-mat-sum -o transpose-mat-vec -o
 
     - name: CFD examples
       run: |