Enable wasm pointer tracking for gc=none.

compileopts/config.go

@@ -105,6 +105,8 @@ func (c *Config) GC() string {
 // that can be traced by the garbage collector.
 func (c *Config) NeedsStackObjects() bool {
 	switch c.GC() {
+	case "none":
+		fallthrough
 	case "conservative":
 		for _, tag := range c.BuildTags() {
 			if tag == "tinygo.wasm" {

src/runtime/gc_stack_portable.go

@@ -1,5 +1,6 @@
-//go:build gc.conservative && tinygo.wasm
+//go:build (gc.conservative || gc.none) && tinygo.wasm
-// +build gc.conservative,tinygo.wasm
+// +build gc.conservative gc.none
+// +build tinygo.wasm
 
 package runtime