[clang] [AArch64] Add missing Neon Types (PR #126945)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-m68k-linux-cross` running on `suse-gary-m68k-cross` while building `clang` at step 5 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/27/builds/10942

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 5 (ninja check 1) failure: stage 1 checked (failure)
******************** TEST 'Clang :: CodeGen/AArch64/mixed-neon-types.c' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/bin/clang -cc1 -internal-isystem /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/lib/clang/21/include -nostdsysteminc  -triple aarch64-linux-gnu -target-feature +neon -x c /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/test/CodeGen/AArch64/mixed-neon-types.c -emit-llvm -o - | /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/bin/FileCheck /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/test/CodeGen/AArch64/mixed-neon-types.c --check-prefix=CHECK-C # RUN: at line 2
+ /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/bin/clang -cc1 -internal-isystem /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/lib/clang/21/include -nostdsysteminc -triple aarch64-linux-gnu -target-feature +neon -x c /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/test/CodeGen/AArch64/mixed-neon-types.c -emit-llvm -o -
+ /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/bin/FileCheck /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/test/CodeGen/AArch64/mixed-neon-types.c --check-prefix=CHECK-C
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/test/CodeGen/AArch64/mixed-neon-types.c:27:10: fatal error: 'arm_neon.h' file not found
   27 | #include <arm_neon.h>
      |          ^~~~~~~~~~~~
1 error generated.
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/bin/FileCheck /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/test/CodeGen/AArch64/mixed-neon-types.c --check-prefix=CHECK-C

--

********************


```

</details>

https://github.com/llvm/llvm-project/pull/126945