Add linux/amd64 ncnn runtime and header

Add prebuilt NCNN runtime artifacts for linux/amd64: libncnn.so and libzima_ncnn_runtime.h, and update libzima_ncnn_runtime.so. Remove darwin/arm64 and linux/arm64 runtime binaries. Also add .DS_Store placeholders in builtin/ncnn and platform subfolders.

Author: orca-zhang

builtin/ncnn/darwin/arm64/libzima_ncnn_runtime.dylib

@@ -0,0 +1,91 @@
+/* Code generated by cmd/cgo; DO NOT EDIT. */
+
+/* package github.com/IceWhaleTech/ZimaOS-Search/tools/ncnn_runtime_wrapper */
+
+
+#line 1 "cgo-builtin-export-prolog"
+
+#include <stddef.h>
+
+#ifndef GO_CGO_EXPORT_PROLOGUE_H
+#define GO_CGO_EXPORT_PROLOGUE_H
+
+#ifndef GO_CGO_GOSTRING_TYPEDEF
+typedef struct { const char *p; ptrdiff_t n; } _GoString_;
+#endif
+
+#endif
+
+/* Start of preamble from import "C" comments.  */
+
+
+#line 3 "main.go"
+
+#include <stdint.h>
+#include <stdlib.h>
+
+#line 1 "cgo-generated-wrapper"
+
+
+/* End of preamble from import "C" comments.  */
+
+
+/* Start of boilerplate cgo prologue.  */
+#line 1 "cgo-gcc-export-header-prolog"
+
+#ifndef GO_CGO_PROLOGUE_H
+#define GO_CGO_PROLOGUE_H
+
+typedef signed char GoInt8;
+typedef unsigned char GoUint8;
+typedef short GoInt16;
+typedef unsigned short GoUint16;
+typedef int GoInt32;
+typedef unsigned int GoUint32;
+typedef long long GoInt64;
+typedef unsigned long long GoUint64;
+typedef GoInt64 GoInt;
+typedef GoUint64 GoUint;
+typedef size_t GoUintptr;
+typedef float GoFloat32;
+typedef double GoFloat64;
+#ifdef _MSC_VER
+#include <complex.h>
+typedef _Fcomplex GoComplex64;
+typedef _Dcomplex GoComplex128;
+#else
+typedef float _Complex GoComplex64;
+typedef double _Complex GoComplex128;
+#endif
+
+/*
+  static assertion to make sure the file is being used on architecture
+  at least with matching size of GoInt.
+*/
+typedef char _check_for_64_bit_pointer_matching_GoInt[sizeof(void*)==64/8 ? 1:-1];
+
+#ifndef GO_CGO_GOSTRING_TYPEDEF
+typedef _GoString_ GoString;
+#endif
+typedef void *GoMap;
+typedef void *GoChan;
+typedef struct { void *t; void *v; } GoInterface;
+typedef struct { void *data; GoInt len; GoInt cap; } GoSlice;
+
+#endif
+
+/* End of boilerplate cgo prologue.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern size_t zima_ncnn_status_json_v1(char* req, size_t reqLen, char* out, size_t outCap);
+extern size_t zima_ncnn_load_json_v1(char* req, size_t reqLen, char* out, size_t outCap);
+extern size_t zima_ncnn_infer_json_v1(char* req, size_t reqLen, char* out, size_t outCap);
+extern size_t zima_ncnn_unload_json_v1(char* req, size_t reqLen, char* out, size_t outCap);
+extern size_t zima_ncnn_switch_backend_json_v1(char* req, size_t reqLen, char* out, size_t outCap);
+
+#ifdef __cplusplus
+}
+#endif