Clear entire working directory

.github/workflows/master_build.yml

@@ -159,11 +159,11 @@ jobs:
           echo ::set-env name=HF_PFX_PASSPHRASE::${{secrets.pfx_key}}
           echo "::set-env name=HF_PFX_FILE::${{runner.workspace}}\build\codesign.pfx"
         fi          
-    - name: Clear Build Directory
+    - name: Clear Working Directory
       if: matrix.os[1] == 'windows'
       shell: bash
       working-directory: ${{runner.workspace}}
-      run: rm -rf build hifi symbols-temp
+      run: rm -rf ./*
     - uses: actions/checkout@v1
       with: 
         submodules: true