[clang] [llvm] [AArch64] Add ability to list extensions enabled for a target (PR #95805)

[David Spickett via cfe-commits]

https://github.com/DavidSpickett commented:

Cool idea, should be very useful.

The TableGen has changed so much since I last looked so I didn't look over that myself.

https://github.com/llvm/llvm-project/pull/95805