fix(metro): cannot read property 'toUpperCase' of undefined

[tido64]

Summary

Latest Metro crashes in React Native 0.65.0-rc.2:

/~/node_modules/metro-hermes-compiler/src/emhermesc.js:77
          throw ex;
          ^

RuntimeError: abort(TypeError: Cannot read property 'toUpperCase' of undefined). Build with -s ASSERTIONS=1 for more info.
    at process.abort (/~/node_modules/metro-hermes-compiler/src/emhermesc.js:440:13)
    at process.emit (node:events:406:35)
    at emit (node:internal/process/promises:136:22)
    at processPromiseRejections (node:internal/process/promises:242:25)
    at processTicksAndRejections (node:internal/process/task_queues:97:32)
Process terminated. Press <enter> to close the window

Test plan

npx react-native init RN065RC2 --version 0.65.0-rc.2
cd RN065RC2
yarn ios

[tido64]

cc @RSNara, @motiz88

[facebook-github-bot]

@ShikaSD has imported this pull request. If you are a Facebook employee, you can view this diff on Phabricator.

[facebook-github-bot]

@ShikaSD merged this pull request in f7c6325.