Add setting for skipping fbsource version check

Summary: Added a setting "Match local fbsource chekout", which inverserly corresponds to the `ignore_local_pin` setting in `flipper-launcher.toml`.

Reviewed By: passy

Differential Revision: D19030456

fbshipit-source-id: deaaf4e873a00bbc4e8bd3034353cf580df95a36

src/fb-stubs/LauncherSettingsPanel.tsx

@@ -10,8 +10,10 @@
 import {Tristate} from 'src/reducers/settings';
 
 export default function(_props: {
-  enabledInConfig: Tristate;
-  onChange: (v: Tristate) => void;
+  isPrefetchingEnabled: Tristate;
+  onEnablePrefetchingChange: (v: Tristate) => void;
+  isLocalPinIgnored: boolean;
+  onIgnoreLocalPinChange: (v: boolean) => void;
 }) {
   return null;
 }