Add basic exercising of rustls-graviola #236

	name: build

	on:
	push:
	pull_request:
	schedule:
	- cron: '0 18 * * *'

	env:
	CARGO_TERM_COLOR: always

	jobs:
	build:
	strategy:
	matrix:
	include:
	- os: ubuntu-latest
	- os: macos-latest
	- os: windows-latest
	- os: ubuntu-latest
	cross: aarch64-unknown-linux-gnu

	runs-on: ${{ matrix.os }}
	steps:
	- uses: actions/checkout@v4
	with:
	submodules: true

	- name: Install stable toolchain
	uses: dtolnay/rust-toolchain@master
	with:
	toolchain: stable

	- name: Install NASM for aws-lc-rs on Windows
	if: runner.os == 'Windows'
	uses: ilammy/setup-nasm@v1

	- name: Install cross
	if: matrix.cross != ''
	uses: taiki-e/setup-cross-toolchain-action@v1
	with:
	target: ${{ matrix.cross }}

	- name: Build (debug)
	run: cargo build -p graviola
	- name: Run tests (debug)
	run: cargo test

	- name: Build (release)
	run: cargo build -p graviola --release
	- name: Run tests (release)
	run: env SLOW_TESTS=1 cargo test --release

	- name: Artificial CPU feature tests (x86_64)
	if: runner.arch == 'X64'
	run: \|
	# test software fallbacks for sha256 and sha512
	env GRAVIOLA_CPU_DISABLE_sha=1 GRAVIOLA_CPU_DISABLE_bmi2=1 cargo test

Provide feedback