Update and rename c-cpp.yml to standalone-ci.yml

merged pack and build into one step

.github/workflows/standalone-ci.yml

@@ -0,0 +1,19 @@
+name: C/C++ CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-18.04
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: install dependencies
+      run: sudo apt-get install -y build-essential cmake libasio-dev
+    - name: build and pack
+      run: pwd && ls && mkdir build && cd build && cmake .. && cmake --build . && cpack