[clang] [llvm] [AArch64] Add soft-float ABI (PR #84146)

[Oliver Stannard via cfe-commits]

ostannard wrote:

Those two regressions turned out to be an existing bug, which previously only triggered with `-Wno-int-conversion`. They should be fixed by #114217 and #114218.

https://github.com/llvm/llvm-project/pull/84146