whisper.cpp: install the script for downloading models as well

And adjust it to download them to where the executables expect
them to be by default.

whisper.cpp isn't really meant to be installed, so we make up our
own workflow here...

mingw-w64-whisper.cpp/0004-download-models-pwd.patch

@@ -0,0 +1,12 @@
+--- whisper.cpp-1.5.1/models/download-ggml-model.sh.orig	2023-12-01 11:17:20.703388700 +0100
++++ whisper.cpp-1.5.1/models/download-ggml-model.sh	2023-12-01 11:17:38.547029400 +0100
+@@ -19,7 +19,8 @@
+     fi
+ }
+ 
+-models_path="$(get_script_path)"
++models_path="$(pwd)/models"
++mkdir -p "$models_path"
+ 
+ # Whisper models
+ models=(

mingw-w64-whisper.cpp/PKGBUILD

@@ -24,10 +24,13 @@ makedepends=(
 source=("https://github.com/ggerganov/whisper.cpp/archive/refs/tags/v${pkgver}.tar.gz"
         "0001-fix-importlib-location.patch"
         "0002-fix-openblas-lookup.patch"
-        "0003-server-fix-missing-lib.patch")
+        "0003-server-fix-missing-lib.patch"
+        "0004-download-models-pwd.patch")
 sha256sums=('ccf17e3283bcde3d09d333889528f3494e196f8a173d5023fec068a0dfae8f76'
             '30765001468dbc40893a2a63e675b2b40f290e27c3314e82dd7f72404d2d1ccf'
-            '0314546c2ab5810ba84d4b2e14a84f992a282fc57698bd7a678756f8f6d13171')
+            '0314546c2ab5810ba84d4b2e14a84f992a282fc57698bd7a678756f8f6d13171'
+            '0d29b3df33df73683c2f3c3c02e3e522d9a1dbd3eaf8ac5fd6c920d81364fdd2'
+            '5d2290937b6407f97d60f8fb0bf0f270a95820611c951464a217e86a3a0f35e4')
 noextract=("v${pkgver}.tar.gz")
 
 prepare() {
@@ -37,6 +40,10 @@ prepare() {
   patch -p1 -i "${srcdir}/0001-fix-importlib-location.patch"
   patch -p1 -i "${srcdir}/0002-fix-openblas-lookup.patch"
   patch -p1 -i "${srcdir}/0003-server-fix-missing-lib.patch"
+
+  # So that "whisper.cpp-download-ggml-model.sh base.en"
+  # is all that's needed to get started
+  patch -p1 -i "${srcdir}/0004-download-models-pwd.patch"
 }
 
 build() {
@@ -82,5 +89,8 @@ package() {
   mv "${pkgdir}${MINGW_PREFIX}/bin/${_realname}-main.exe" \
     "${pkgdir}${MINGW_PREFIX}/bin/${_realname}.exe"
 
+   install -Dm755 "${srcdir}/${_realname}-${pkgver}/models/download-ggml-model.sh" \
+     "${pkgdir}${MINGW_PREFIX}/bin/${_realname}-download-ggml-model.sh"
+
   install -Dm644 "${srcdir}/${_realname}-${pkgver}/LICENSE" "${pkgdir}${MINGW_PREFIX}/share/licenses/${_realname}/LICENSE"
 }