workflow yaml updates

.github/workflows/gf.yml

@@ -156,6 +156,10 @@ jobs:
     - name: Merge Coverage
       run: |
         for file in `find . -name coverage.txt`; do
+            # In case of recursively incremental selffile in root directory.
+            if [ ".coverage.txt" = $file ]; then
+                continue 1
+            fi
             cat $file >> coverage.txt
         done