[Test] Start porting to Github Actions with build test

.github/workflows/build.yml

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+name: OpenFPGA CI
+
+# Run CI on
+# - each push
+# - each pull request
+# - scheduled weekly
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: '0 0 * * 0 ' # weekly
+
+# Multiple job to tests
+jobs:
+  # Test the compilation
+  build_gcc8:
+    runs-on: ubuntu-18.04
+
+    # Define the steps to run the build job
+    steps:
+      - name: Checkout OpenFPGA repo
+        uses: actions/checkout@v2
+
+      - name: Install dependency
+        run: source install_dependency.sh 
+
+      - name: Compile OpenFPGA
+        uses: nicledomaS/cmake_build_action@v1
+        with:
+          submodule_update: OFF
+          cmake_args: -DCMAKE_BUILD_TYPE=release;-DCMAKE_C_COMPILER=gcc-8;-DCMAKE_CXX_COMPILER=g++-8;

.github/workflows/install_dependency.sh

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+# Install all the dependency for OpenFPGA in Ubuntu-18.04
+sudo apt-get update
+sudo apt-get install autoconf
+sudo apt-get install automake
+sudo apt-get install bash
+sudo apt-get install bison
+sudo apt-get install build-essential
+sudo apt-get install cmake
+sudo apt-get install ctags
+sudo apt-get install curl
+sudo apt-get install doxygen
+sudo apt-get install flex
+sudo apt-get install fontconfig
+sudo apt-get install gdb
+sudo apt-get install git
+sudo apt-get install gperf
+sudo apt-get install iverilog
+sudo apt-get install libcairo2-dev
+sudo apt-get install libevent-dev
+sudo apt-get install libfontconfig1-dev
+sudo apt-get install liblist-moreutils-perl
+sudo apt-get install libncurses5-dev
+sudo apt-get install libx11-dev
+sudo apt-get install libxft-dev
+sudo apt-get install libxml++2.6-dev
+sudo apt-get install perl
+sudo apt-get install python
+sudo apt-get install python-lxml
+sudo apt-get install texinfo
+sudo apt-get install time
+sudo apt-get install valgrind
+sudo apt-get install zip
+sudo apt-get install qt5-default
+sudo apt-get install clang-format-7
+# Add all the supported compilers
+sudo apt-get install g++-5
+sudo apt-get install gcc-5
+sudo apt-get install g++-6
+sudo apt-get install gcc-6
+sudo apt-get install g++-7
+sudo apt-get install gcc-7
+sudo apt-get install g++-8
+sudo apt-get install gcc-8
+sudo apt-get install g++-9
+sudo apt-get install gcc-9
+sudo apt-get install clang-6.0
+sudo apt-get install clang-8