swift : package no longer use ggml dependency (#1861)

* Revert "swift : update Package.swift to use ggml as package dependency (#1701)"

This reverts commit 993acb5.

* spm : add ggml.h

Package.swift

@@ -13,13 +13,9 @@ let package = Package(
  products: [
  .library(name: "whisper", targets: ["whisper"]),
  ],
- dependencies: [
- .package(url: "https://github.com/ggerganov/ggml.git", .branch("release"))
- ],
  targets: [
  .target(
  name: "whisper",
- dependencies: ["ggml"],
  path: ".",
  exclude: [
  "bindings",
@@ -36,8 +32,14 @@ let package = Package(
  "Makefile"
  ],
  sources: [
+ "ggml.c",
  "whisper.cpp",
+ "ggml-alloc.c",
+ "ggml-backend.c",
+ "ggml-quants.c",
+ "ggml-metal.m"
  ],
+ resources: [.process("ggml-metal.metal")],
  publicHeadersPath: "spm-headers",
  cSettings: [
  .unsafeFlags(["-Wno-shorten-64-to-32", "-O3", "-DNDEBUG"]),

spm-headers/ggml.h

@@ -0,0 +1 @@
+../ggml.h