devtool: standard: update-recipe/finish: fix update localfile in another layer

devtool: standard: update-recipe/finish: fix update localfile in another layer

When trying to use devtool update-recipe/finish on another layer, with modified
local file we have the following error:

  Traceback (most recent call last):
    File "<..>/poky/scripts/devtool", line 350, in <module>
      ret = main()
            ^^^^^^
    File "<..>/poky/scripts/devtool", line 337, in main
      ret = args.func(args, config, basepath, workspace)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "<..>/poky/scripts/lib/devtool/standard.py", line 1968, in update_recipe
      updated, _, _ = _update_recipe(args.recipename, workspace, rd, args.mode, args.append, args.wildcard_version, args.no_remove, args.initial_rev, dry_run_outdir=dry_run_outdir, no_overrides=args.no_overrides, force_patch_refresh=args.force_patch_refresh)
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "<..>/poky/scripts/lib/devtool/standard.py", line 1930, in _update_recipe
      updated, appendf, removed = _update_recipe_patch(recipename, workspace, srctree, crd, appendlayerdir, wildcard_version, no_remove, no_report_remove, initial_rev, dry_run_outdir, force_patch_refresh)
                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "<..>/poky/scripts/lib/devtool/standard.py", line 1747, in _update_recipe_patch
      patchdir = param.get('patchdir', ".")
                 ^^^^^^^^^
  AttributeError: 'str' object has no attribute 'get'

This was introduced when adding support for git submodules.
No selftest case exists to catch this, so a selftest will be
added in another commit.

Signed-off-by: Julien Stephan <jstephan@baylibre.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>