internal/driver: skip TestHttpsInsecure test on iOS (#256)

This will in turn fix golang.org/issues/22612 for the Go iOS
builders.

internal/driver/fetch_test.go

 		Timeout:   10,
 		Symbolize: "remote",
 	}
+	rx := "Saved profile in"
+	if runtime.GOOS == "darwin" && (runtime.GOARCH == "arm" || runtime.GOARCH == "arm64") {
+		// On iOS, $HOME points to the app root directory and is not writable.
+		rx += "|Could not use temp dir"
+	}
 	o := &plugin.Options{
 		Obj: &binutils.Binutils{},
-		UI:  &proftest.TestUI{T: t, AllowRx: "Saved profile in"},
+		UI:  &proftest.TestUI{T: t, AllowRx: rx},
 	}
 	o.Sym = &symbolizer.Symbolizer{Obj: o.Obj, UI: o.UI}
 	p, err := fetchProfiles(s, o)
 	if len(p.SampleType) == 0 {
 		t.Fatalf("fetchProfiles(%s) got empty profile: len(p.SampleType)==0", address)
 	}
-	if runtime.GOOS == "plan9" {
+	switch runtime.GOOS {
+	case "plan9":
 		// CPU profiling is not supported on Plan9; see golang.org/issues/22564.
 		return
+	case "darwin":
+		if runtime.GOARCH == "arm" || runtime.GOARCH == "arm64" {
+			// CPU profiling on iOS os not symbolized; see golang.org/issues/22612.
+			return
+		}
 	}
 	if len(p.Function) == 0 {
 		t.Fatalf("fetchProfiles(%s) got non-symbolized profile: len(p.Function)==0", address)