runtime: skip TestG0StackOverflow on iOS

Apparently it falls into infinite printing loop. Skipping for now.
Will investigate.

For #62671.

Change-Id: I5be8e8c1d0f4f2eaa231d6bcdfe13e7f08c28b98
Reviewed-on: https://go-review.googlesource.com/c/go/+/528403
Reviewed-by: Bryan Mills <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Run-TryBot: Bryan Mills <[email protected]>

Author: cherrymui

src/runtime/crash_test.go

@@ -792,6 +792,10 @@ func TestRuntimePanic(t *testing.T) {
 func TestG0StackOverflow(t *testing.T) {
 	testenv.MustHaveExec(t)
 
+	if runtime.GOOS == "ios" {
+		testenv.SkipFlaky(t, 62671)
+	}
+
 	if os.Getenv("TEST_G0_STACK_OVERFLOW") != "1" {
 		cmd := testenv.CleanCmdEnv(exec.Command(os.Args[0], "-test.run=^TestG0StackOverflow$", "-test.v"))
 		cmd.Env = append(cmd.Env, "TEST_G0_STACK_OVERFLOW=1")