Store artifact from Build workflow.

.github/workflows/build.yml

@@ -15,13 +15,18 @@ jobs:
     - uses: actions/checkout@v2
       with:
         submodules: recursive
-    - name: install libelf
+    - name: Install LibELF
       run: sudo apt install -y libelf-dev
-    - name: install libconfig
+    - name: Install LibConfig
       run: sudo apt install -y libconfig-dev 
-    - name: install llvm
+    - name: Install LLVM
       run: sudo apt install -y llvm
-    - name: make
+    - name: Make project
       run: make
-    - name: install
+    - name: Install project
       run: sudo make install
+    - name: Store build artifacts
+      uses: actions/upload-artifact@master
+      with:
+        name: Build Output
+        path: build/xdpfw