[flang-commits] [clang] [flang] [Flang][Driver] NFC: Move Flang/Fortran only options to a separate file (PR #194398)

[Tarun Prabhu via flang-commits]

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tarunprabhu wrote:

```suggestion
* add a completely new definition if the option that you are adding has not
been defined yet. These must be added to `clang/Options/FlangOptions.td`
unless they are intended to be shared with Clang, in which case they should
be added to `clang/Options/Options.td`
```

https://github.com/llvm/llvm-project/pull/194398