message: script: remove gitian reference from symbol-check.py
diff: # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  '''
  -A script to check that the executables produced by gitian only contain
  -certain symbols and are only linked against allowed libraries.
  +A script to check that release executables only contain certain symbols
  +and are only linked against allowed libraries.
  Example usage:
  - find ../gitian-builder/build -type f -executable | xargs python3 contrib/devtools/symbol-check.py
  + find ../path/to/binaries -type f -executable | xargs python3 contrib/devtools/symbol-check.py
  '''
  import subprocess
  import sys
  