[llvm] [AArch64] Fix missing :lo12: on the catchret address pair (PR #219200)

[Jonas Heinle via llvm-commits]

Kataglyphis wrote:

Read and understood, including the AI Tool Use Policy — noted in the PR description (see the "AI tool use" section) and as an `Assisted-by:` trailer on the commit.

Local results, AArch64 build with assertions: `check-llvm-codegen-aarch64` 4112/4117 (5 XFAIL, no unexpected failures), `check-llvm-mc-aarch64` 2359/2359, and full `check-llvm` with 4 failures that reproduce identically with an unpatched `llc` — they need the x86 default triple this AArch64-only build lacks. Staying in draft until pre-merge CI confirms it on `main`.


https://github.com/llvm/llvm-project/pull/219200