Added CUDA build workflow #191

	name: Build

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	jobs:
	build-and-run-serial:
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v2
	- name: Build-Serial
	run: cmake -DBACKEND=serial -DCOMPILER=gnu -B build_serial_gnu -S . && make -C build_serial_gnu
	- name: Test-Serial
	run: make test -C build_serial_gnu
	build-and-run-omp:
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v2
	- name: Build-OMP
	run:
	cmake -DBACKEND=openmp -DCOMPILER=gnu -B build_omp_gnu -S . && make -C build_omp_gnu
	- name: Test-OMP
	run: make test -C build_omp_gnu
	build-cuda:
	runs-on: self-hosted
	steps:
	- uses: actions/checkout@v2
	- name: Run batch file
	run: cd tests/misc && chmod +x batch.batch && srun batch.batch

Provide feedback