bitbake: fetch2/wget: Fix typo in exception name

This could clearly never have worked since the python3 migration
but as its in an error path, it doesn't get tested/used much.

(Bitbake rev: 704f27dc28d50a6dc02c8b64274ee4ecb3058c4a)

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

bitbake/lib/bb/fetch2/wget.py

@@ -168,7 +168,7 @@ class Wget(FetchMethod):
                 """
                 host = req.host
                 if not host:
-                    raise urlllib2.URLError('no host given')
+                    raise urllib.error.URLError('no host given')
 
                 h = http_class(host, timeout=req.timeout) # will parse host:port
                 h.set_debuglevel(self._debuglevel)