fix ggml arm64 cuda build (#520)

llm/llama.cpp/ggml_patch/0005-ggml-support-CUDA-s-half-type-for-aarch64-1455-2670.patch

@@ -0,0 +1,32 @@
+From 1e3bc523d8053a77df3ac7126a84d0297ee97ef6 Mon Sep 17 00:00:00 2001
+From: Kylin <56434533+KyL0N@users.noreply.github.com>
+Date: Tue, 22 Aug 2023 15:14:23 +0800
+Subject: [PATCH] ggml : support CUDA's half type for aarch64(#1455) (#2670)
+
+* ggml: support CUDA's half type for aarch64(#1455)
+support CUDA's half type for aarch64 in ggml_fp16_t definition
+
+* ggml: use __CUDACC__ to recognise nvcc compiler
+---
+ ggml.h | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/ggml.h b/ggml.h
+index 544ad2d..0ec7ec5 100644
+--- a/ggml.h
++++ b/ggml.h
+@@ -259,8 +259,9 @@
+ extern "C" {
+ #endif
+ 
+-#ifdef __ARM_NEON
+-    // we use the built-in 16-bit float type
++#if defined(__ARM_NEON) && defined(__CUDACC__)
++    typedef half ggml_fp16_t;
++#elif defined(__ARM_NEON)
+     typedef __fp16 ggml_fp16_t;
+ #else
+     typedef uint16_t ggml_fp16_t;
+-- 
+2.39.2 (Apple Git-143)
+