bitbake: bitbake/bs4: Upgrade 4.3.2 -> 4.4.1 (python 3 version)

Upgrade to 4.4.1 which has been run through 2to3 as per the maintainers
recommendation for v3 use.

(Bitbake rev: 2f4b98af93c971a8c466ffaf3c09cca0edb6e3ad)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bs4/tests/test_htmlparser.py

@@ -1,6 +1,8 @@
 """Tests to ensure that the html.parser tree builder generates good
 trees."""
 
+from pdb import set_trace
+import pickle
 from bs4.testing import SoupTest, HTMLTreeBuilderSmokeTest
 from bs4.builder import HTMLParserTreeBuilder
 
@@ -17,3 +19,14 @@ class HTMLParserTreeBuilderSmokeTest(SoupTest, HTMLTreeBuilderSmokeTest):
     def test_namespaced_public_doctype(self):
         # html.parser can't handle namespaced doctypes, so skip this one.
         pass
+
+    def test_builder_is_pickled(self):
+        """Unlike most tree builders, HTMLParserTreeBuilder and will
+        be restored after pickling.
+        """
+        tree = self.soup("<a><b>foo</a>")
+        dumped = pickle.dumps(tree, 2)
+        loaded = pickle.loads(dumped)
+        self.assertTrue(isinstance(loaded.builder, type(tree.builder)))
+
+