save ctest log if failure

Author: scivision

.github/workflows/ci_windows.yml

@@ -29,3 +29,9 @@ jobs:
     - name: CTest
       run: ctest --parallel -V
       working-directory: build
+
+    - uses: actions/upload-artifact@v1
+      if: failure()
+      with:
+        name: WindowsCMakeTestlog
+        path: build/Testing/Temporary/LastTest.log