message: Fix extracting the tarball every time.
diff: @@ -111,6 +111,10 @@ def download_and_extract(destdir, url, ext):
  subprocess.call(['7z', 'x', '-o{0}'.format(destdir), '-xr!$PLUGINSDIR', dest])
  else:
  subprocess.call(['tar', '-x', '-C', out, '-f', dest])
  + # TODO Remove after migrating to a clang release newer than 5.0.1
  + # For 5.0.1 Mac OS X, the directory and the tarball have different name
  + if destdir == 'build/clang+llvm-5.0.1-x86_64-apple-darwin':
  + os.rename(destdir.replace('5.0.1', '5.0.1-final'), destdir)
  else:
  print('Found extracted at {0}'.format(destdir))
  @@ -201,11 +205,6 @@ def configure(ctx):
  print('Checking for clang')
  download_and_extract(CLANG_DIRECTORY, CLANG_TARBALL_URL, CLANG_TARBALL_EXT)
  - # TODO Remove after migrating to a clang release newer than 5.0.1
  - # For 5.0.1 Mac OS X, the directory and the tarball have different name
  - if ctx.options.bundled_clang == '5.0.1' and sys.platform == 'darwin':
  - CLANG_TARBALL_NAME = 'clang+llvm-5.0.1-final-x86_64-apple-darwin'
  -
  bundled_clang_dir = os.path.join(out, ctx.options.variant, 'lib', CLANG_TARBALL_NAME)
  try:
  os.makedirs(os.path.dirname(bundled_clang_dir))
  