cg_llvm: Add Arch::AArch64 match arm for reliable f128 target cfg

Author: okaneco

compiler/rustc_codegen_llvm/src/llvm_util.rs

@@ -399,6 +399,9 @@ fn update_target_reliable_float_cfg(sess: &Session, cfg: &mut TargetConfig) {
     };
 
     cfg.has_reliable_f128 = match (target_arch, target_os) {
+        // FIXME: Caused CI failures while trying to implement https://github.com/rust-lang/rust/pull/152512,
+        // no "upstream" issue to currently link to
+        (Arch::AArch64, _) if !cfg.target_features.iter().any(|f| f.as_str() == "neon") => false,
         // Unsupported https://github.com/llvm/llvm-project/issues/121122
         (Arch::AmdGpu, _) => false,
         // Unsupported <https://github.com/llvm/llvm-project/issues/94434>