Add windows/arm64 for Go 1.17

Author: dgurney

Makefile

@@ -8,6 +8,7 @@ windows:
 	GOOS=windows GOARCH=amd64 go build ${LDFLAGS} -o build/windows/amd64/${PROGRAM}.exe ${PROGRAMPATH}
 	GOOS=windows GOARCH=386 go build ${LDFLAGS} -o build/windows/386/${PROGRAM}.exe ${PROGRAMPATH}
 	GOOS=windows GOARM=7 GOARCH=arm go build ${LDFLAGS} -o build/windows/arm/${PROGRAM}.exe ${PROGRAMPATH}
+	GOOS=windows GOARCH=arm64 go build ${LDFLAGS} -o build/windows/arm64/${PROGRAM}.exe ${PROGRAMPATH}
 darwin:
 	GOOS=darwin GOARCH=amd64 go build ${LDFLAGS} -o build/darwin/amd64/${PROGRAM} ${PROGRAMPATH}
 	GOOS=darwin GOARCH=arm64 go build ${LDFLAGS} -o build/darwin/arm64/${PROGRAM} ${PROGRAMPATH}