try to run external target repo test

Author: tinder-maxwellelliott

.github/workflows/integration.yaml

@@ -28,3 +28,11 @@ jobs:
       - uses: actions/checkout@v2
       - name: Run integration test
         run: ./integration/integration_test.sh -e
+      - uses: actions/checkout@v2
+        with:
+          repository: tinder-maxwellelliott/bazel-diff-repro-1
+          ref: wip_fix
+          path: /tmp/ExternalTargetImpactTest
+          fetch-depth: 0
+      - name: Run External Target Impact test
+        run: /tmp/ExternalTargetImpactTest/bazel-diff.sh