mpv: workaroung before ndk r23 in fdroidserver is fixed

metadata/is.xyz.mpv.yml

@@ -82,8 +82,6 @@ Builds:
       - mpv@564f3dba56f3b05e913ef7c10604cccd9e7f8d16
     prebuild:
       - cd ../buildscripts/
-      - mkdir -p sdk
-      - ln -s $$NDK$$ sdk/android-ndk-r23
       - mkdir -p deps
       - pushd deps/
       - cp -r $$mbedtls$$ mbedtls
@@ -104,9 +102,13 @@ Builds:
       - buildscripts/deps/mbedtls/
     build:
       - cd ../buildscripts/
+      - mkdir -p sdk
+      - cd sdk
+      - curl -Lo ndk.zip https://dl.google.com/android/repository/android-ndk-r23-linux.zip
+      - unzip -q ndk.zip
+      - cd ..
       - ./buildall.sh --arch arm64 mpv
       - ./buildall.sh
-    ndk: r23
 
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