Update workflow file

We need to checkout submodules
We should run on all branches

.github/workflows/ccpp.yml

@@ -2,10 +2,8 @@ name: C/C++ CI
 
 on:
   push:
-    branches: [ master ]
   pull_request:
-    branches: [ master ]
-    
+
 env:
   # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
   BUILD_TYPE: Release
@@ -17,6 +15,11 @@ jobs:
     
     steps:
     - uses: actions/checkout@v2
+
+    - name : submodule checkout
+      # Need to update submodules
+      run: git submodule update --init --depth 1
+
     - name: Create Build Environment
       # Some projects don't allow in-source building, so create a separate build directory
       # We'll use this as our working directory for all subsequent commands