build: support mount on windows/arm64 - all windows binaries now not cgo

This builds all windows binaries without CGO but with cmount.

cgofuse has a compile mode which works without CGO on Windows for
amd64/x86/arm64 architectures so switch to using that.

bin/cross-compile.go

@@ -265,9 +265,12 @@ func buildWindowsResourceSyso(goarch string, versionTag string) string {
 		"-o",
 		sysoPath,
 	}
-	if goarch == "amd64" {
+	if strings.Contains(goarch, "64") {
 		args = append(args, "-64") // Make the syso a 64-bit coff file
 	}
+	if strings.Contains(goarch, "arm") {
+		args = append(args, "-arm") // Make the syso an arm binary
+	}
 	args = append(args, jsonPath)
 	err = runEnv(args, nil)
 	if err != nil {