message: sign only if requested
diff: @@ -61,12 +61,14 @@ def build():
  if args.linux:
  print('\nCompiling ' + args.version + ' Linux')
  subprocess.check_call(['bin/gbuild', '-j', args.jobs, '-m', args.memory, '--commit', 'peercoin='+args.commit, '--url', 'peercoin='+args.url, '../peercoin/contrib/gitian-descriptors/gitian-linux.yml'])
  + if args.sign:
  subprocess.check_call(['bin/gsign', '-p', args.sign_prog, '--signer', args.signer, '--release', args.version+'-linux', '--destination', '../gitian.sigs/', '../peercoin/contrib/gitian-descriptors/gitian-linux.yml'])
  subprocess.check_call('mv build/out/peercoin-*.tar.gz build/out/src/peercoin-*.tar.gz ../peercoin-binaries/'+args.version, shell=True)
  if args.windows:
  print('\nCompiling ' + args.version + ' Windows')
  subprocess.check_call(['bin/gbuild', '-j', args.jobs, '-m', args.memory, '--commit', 'peercoin='+args.commit, '--url', 'peercoin='+args.url, '../peercoin/contrib/gitian-descriptors/gitian-win.yml'])
  + if args.sign:
  subprocess.check_call(['bin/gsign', '-p', args.sign_prog, '--signer', args.signer, '--release', args.version+'-win-unsigned', '--destination', '../gitian.sigs/', '../peercoin/contrib/gitian-descriptors/gitian-win.yml'])
  subprocess.check_call('mv build/out/peercoin-*-win-unsigned.tar.gz inputs/', shell=True)
  subprocess.check_call('mv build/out/peercoin-*.zip build/out/peercoin-*.exe build/out/src/peercoin-*.tar.gz ../peercoin-binaries/'+args.version, shell=True)
  @@ -74,6 +76,7 @@ def build():
  if args.macos:
  print('\nCompiling ' + args.version + ' MacOS')
  subprocess.check_call(['bin/gbuild', '-j', args.jobs, '-m', args.memory, '--commit', 'peercoin='+args.commit, '--url', 'peercoin='+args.url, '../peercoin/contrib/gitian-descriptors/gitian-osx.yml'])
  + if args.sign:
  subprocess.check_call(['bin/gsign', '-p', args.sign_prog, '--signer', args.signer, '--release', args.version+'-osx-unsigned', '--destination', '../gitian.sigs/', '../peercoin/contrib/gitian-descriptors/gitian-osx.yml'])
  subprocess.check_call('mv build/out/peercoin-*-osx-unsigned.tar.gz inputs/', shell=True)
  subprocess.check_call('mv build/out/peercoin-*.tar.gz build/out/peercoin-*.dmg build/out/src/peercoin-*.tar.gz ../peercoin-binaries/'+args.version, shell=True)
  