Benjamin Kramer 2916b99182 [ADT] Alias llvm::Optional to std::optional ...

This avoids the continuous API churn when upgrading things to use
std::optional and makes trivial string replace upgrades possible.

I tested this with GCC 7.5, the oldest supported GCC I had around.

Differential Revision: https://reviews.llvm.org/D140332

2022-12-20 01:01:46 +01:00

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