modify to show cppcheck result even when failure

Signed-off-by: kminoda <[email protected]>

.github/workflows/cppcheck-differential.yaml

@@ -45,11 +45,15 @@ jobs:
           echo "Running Cppcheck on changed files: $files"
           cppcheck --enable=all --inconclusive --check-level=exhaustive --error-exitcode=1 $files 2> cppcheck-report.txt
           # cppcheck --enable=all --inconclusive --check-level=exhaustive --error-exitcode=1 --suppressions-list=.cppcheck_suppressions $files 2> cppcheck-report.txt
-          cat cppcheck-report.txt
         else
           echo "No C++ files changed."
+          touch cppcheck-report.txt
         fi
       shell: bash
+
+    - name: Show cppcheck-report result
+      run: |
+        cat cppcheck-report.txt
 
     - name: Upload Cppcheck report
       uses: actions/upload-artifact@v2