os_anyos_test: no fstat on wasm

Author: dkegel-fastly

src/os/os_anyos_test.go

@@ -71,6 +71,10 @@ func equal(name1, name2 string) (r bool) {
 }
 
 func TestFstat(t *testing.T) {
+	if runtime.GOARCH == "wasm" {
+		t.Log("TODO: TestFstat: File.Stat unimplemented, skipping")
+		return
+	}
 	sfname := "TestFstat"
 	path := TempDir() + "/" + sfname
 	payload := writeFile(t, path, O_CREATE|O_TRUNC|O_RDWR, "Hello")