Added github workflow to build and run the tests in Ubuntu (#25)

* Added github workflow to build the project in Ubuntu

* Run the tests in each CI run

.github/workflows/makefile.yml

@@ -0,0 +1,60 @@
+name: C/C++ CI
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+    runs-on: [ubuntu-22.04]
+
+    steps: 
+    - name: "Checkout"
+      uses: actions/checkout@v3
+
+    - name: "Checkout capicxx-core-runtime"
+      uses: actions/checkout@v3 
+      with:
+        repository: COVESA/capicxx-core-runtime
+        path: 'capicxx-core-runtime'
+
+    - name: "Install dbus and googletest"
+      run: |
+        wget http://dbus.freedesktop.org/releases/dbus/dbus-1.13.6.tar.gz
+        tar -xzf dbus-1.13.6.tar.gz
+        for patch in src/dbus-patches/*.patch
+        do
+        	patch -d dbus-1.13.6 -Np1 -i "$PWD/$patch" || continue
+        done
+        
+        cmake -B build-dbus/libdbus -D DBUS_BUILD_TESTS=N -D CMAKE_INSTALL_PREFIX=install -S dbus-1.13.6/cmake
+        cmake --build build-dbus/libdbus
+        cmake --install build-dbus/libdbus --strip
+      
+        sudo apt-get install libgtest-dev
+        cd /usr/src/gtest
+        sudo cmake CMakeLists.txt
+        sudo make
+        sudo cp lib/*.a /usr/lib
+        sudo ln -s /usr/lib/libgtest.a /usr/local/lib/libgtest.a
+        sudo ln -s /usr/lib/libgtest_main.a /usr/local/lib/libgtest_main.a
+
+    - name: "Build capicxx-core-runtime"
+      run: |
+        cmake -S capicxx-core-runtime -B build-core-runtime -D CMAKE_INSTALL_PREFIX=install
+        cmake --build build-core-runtime --target install      
+
+    - name: "Build capicxx-dbus-runtime"
+      run: |
+          cmake -S . -B build-dbus-runtime -D GTEST_ROOT=/usr/src/googletest -D CMAKE_PREFIX_PATH=install -D CMAKE_INSTALL_PREFIX=install
+          cmake --build build-dbus-runtime --target build_tests
+          cmake --install build-dbus-runtime --strip
+
+    - name: "Run tests"
+      run: |
+        ls -l ${{ github.workspace }}/install/lib
+        export LD_LIBRARY_PATH=${{ github.workspace }}/install/lib
+        export COMMONAPI_CONFIG=${{ github.workspace }}/src/test/commonapi-dbus.ini
+        env -C build-dbus-runtime ctest -V