Strip application path from stack traces

Summary:
Stacktraces right now always contain the `/home/$USER/.cache/flipper-launcher/v1.2.3/...` (or equivalent)
which makes deduping and reading harder. This strips the paths.

Reviewed By: mweststrate

Differential Revision: D27130251

fbshipit-source-id: c0e8d5eb1575c6269d49a6aee0e8a5e93996d223

desktop/app/src/utils/pathUtils.tsx

@@ -31,6 +31,15 @@ export function getStaticPath() {
   return _staticPath;
 }
 
+let _appPath: string | undefined = undefined;
+export function getAppPath() {
+  if (!_appPath) {
+    _appPath = path.join(getStaticPath(), '..');
+  }
+
+  return _appPath;
+}
+
 export function getChangelogPath() {
   const staticPath = getStaticPath();
   let changelogPath = '';