message: contrib: macdeploy: Use apple-sdk-tools instead of xar+pbzx
diff: @@ -27,24 +27,13 @@ archive. This makes the SDK less-trivial to extract on non-macOS machines. One
  approach (tested on Debian Buster) is outlined below:
  ```bash
  +# Install/clone tools needed for extracting Xcode.app
  +apt install cpio
  +git clone https://github.com/bitcoin-core/apple-sdk-tools.git
  -apt install clang cpio git liblzma-dev libxml2-dev libssl-dev make
  -
  -git clone https://github.com/tpoechtrager/xar
  -pushd xar/xar
  -./configure
  -make
  -make install
  -popd
  -
  -git clone https://github.com/NiklasRosenstein/pbzx
  -pushd pbzx
  -clang -llzma -lxar pbzx.c -o pbzx -Wl,-rpath=/usr/local/lib
  -popd
  -
  -xar -xf Xcode_10.2.1.xip -C .
  -
  -./pbzx/pbzx -n Content | cpio -i
  +# Unpack Xcode_10.2.1.xip and place the resulting Xcode.app in your current
  +# working directory
  +python3 apple-sdk-tools/extract_xcode.py -f Xcode_10.2.1.xip | cpio -d -i
  ```
  On macOS the process is more straightforward:
  