llvm-project

6ee4eedc - [Clang] Reintroduce obsolete libclang symbols to avoid an ABI break (#149079)

[Clang] Reintroduce obsolete libclang symbols to avoid an ABI break (#149079) For more context, see https://github.com/llvm/llvm-project/pull/119269#issuecomment-3075444493, but briefly, when removing ARCMigrate, I also removed some symbols in libclang, which constitutes an ABI break that we don’t want, so this pr reintroduces the removed symbols; the declarations are marked as deprecated for future removal, and the implementations print an error and do nothing, which is what we used to do when ARCMigrate was disabled. (cherry picked from commit 1600450f9098e5c9cb26840bd53f1be8a2559b7d)