Fix Azure flake8 call

azure-pipelines.yml

@@ -61,6 +61,6 @@ jobs:
         script: |
             set -e
             curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/prepare-and-run-flake8.sh
-            . ./prepare-and-run-flake8.sh pyopencl test
+            . ./prepare-and-run-flake8.sh meshmode test
 
         displayName: 'Flake8'