[clang] [llvm] [AArch64] Add intrinsics for multi-vector to ZA array vector accumulators (PR #91606)

[Fangrui Song via cfe-commits]

================
@@ -0,0 +1,29 @@
+// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sme -verify -emit-llvm %s
----------------
MaskRay wrote:

`-emit-llvm-only` is more conventional when the output is unneeded.

In our internal build system, PWD is read-only and `-emit-llvm` would cause a failure.
I changed this to `-emit-llvm-only` and changed `aarch64-none-linux-gnu` (none is sometimes used as an OS) to `aarch64` (generic ELF) to indicate that the behavior does not require Linux.

https://github.com/llvm/llvm-project/pull/91606