adding missing xxd dependency

Author: PatrickRobbIOL

.github/workflows/build.yml

@@ -444,7 +444,7 @@ jobs:
       - name: Install tools 
         run: |
           sudo apt-get update
-          sudo apt-get install -y wget build-essential
+          sudo apt-get install -y wget build-essential xxd
         env:
           WASI_SDK_PATH: /opt/wasi-sdk