Add windows-arm64 workflow #1

	name: windows-arm64

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]
	schedule:
	- cron: '0 0 * * 0'

	jobs:
	build-windows-arm64:
	runs-on: windows-latest
	steps:
	- name: Checkout sources
	run: \|
	git clone https://github.com/google/angle .
	- name: Fetch depot_tools
	run: \|
	git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
	- name: Build
	shell: cmd
	run: \|
	set PATH=%cd%\depot_tools;%PATH%
	set DEPOT_TOOLS_WIN_TOOLCHAIN=0
	set vs2019_install=C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise
	set WINDOWSSDKDIR=C:\Program Files (x86)\Windows Kits\10
	cmd /c gclient
	cmd /c python scripts/bootstrap.py
	cmd /c gclient sync
	cmd /c gn gen out/Release --args="is_debug=false target_cpu=\"arm64\" angle_build_all=false"
	cmd /c autoninja -C out/Release
	- name: Pack
	shell: bash
	run: \|
	mkdir angle-windows-arm64
	mkdir angle-windows-arm64/dist
	rm -rf out/Release/cdb
	rm -rf out/Release/gen
	rm -rf out/Release/obj
	rm -rf out/Release/args.gn
	rm -rf out/Release/build.ninja
	rm -rf out/Release/build.ninja.d
	rm -rf out/Release/toolchain.ninja
	rm -rf out/Release/environment.*
	find out/Release -name "*.pdb" -delete
	mv -f out/Release/* angle-windows-arm64/dist/
	cp -rf include angle-windows-arm64/
	find angle-windows-arm64 -name ".clang-format" -delete
	find angle-windows-arm64 -name "*.md" -delete
	- name: Upload Artifact
	uses: actions/upload-artifact@v2
	with:
	name: angle-windows-arm64
	path: angle-windows-arm64

Provide feedback