cmd/dist: only build ios_exec wrapper for ios

Not for darwin/arm64.

Updates #38485.

Change-Id: I08a5f00fd77f20c9c483755a36755a63cf10aa1a
Reviewed-on: https://go-review.googlesource.com/c/go/+/262558
Trust: Cherry Zhang <[email protected]>
Run-TryBot: Cherry Zhang <[email protected]>
TryBot-Result: Go Bot <[email protected]>
Reviewed-by: Austin Clements <[email protected]>

Author: cherrymui

src/cmd/dist/build.go

@@ -1462,8 +1462,8 @@ func wrapperPathFor(goos, goarch string) string {
 		if gohostos != "android" {
 			return pathf("%s/misc/android/go_android_exec.go", goroot)
 		}
-	case (goos == "darwin" || goos == "ios") && goarch == "arm64":
-		if gohostos != "darwin" || gohostarch != "arm64" {
+	case goos == "ios":
+		if gohostos != "ios" {
 			return pathf("%s/misc/ios/go_ios_exec.go", goroot)
 		}
 	}