message: use `patch` tool for both windows and unix
diff: @@ -61,12 +61,9 @@ def _repos_are_siblings():
  return Label("@foo//bar").workspace_root.startswith("../")
  # Apply a patch_file to the repository root directory
  -# Runs 'git apply' on Unix, 'patch -p1' on Windows.
  +# Runs 'patch -p1' on both Windows and Unix.
  def _apply_patch(ctx, patch_file):
  - if _is_windows(ctx):
  patch_command = ["patch", "-p1", "-d", ctx.path("."), "-i", ctx.path(patch_file)]
  - else:
  - patch_command = ["git", "apply", "-v", ctx.path(patch_file)]
  cmd = _wrap_bash_cmd(ctx, patch_command)
  _execute_and_check_ret_code(ctx, cmd)
  