games/anki: Unbreak

Unbreak since www/py-qt5-webengine is usable again since r497003.

Also update the patch for aqt/qt.py to load PyQt5.QtWebChannel explicitly.
Otherwise Anki will crash upon invocation.

PR:		233192
Approved by:	mentors (implicit)

games/anki/Makefile

@@ -14,8 +14,6 @@ COMMENT=	Flashcard trainer with spaced repetition
 LICENSE=	AGPLv3+
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
-BROKEN=		Depends on www/py-qt5-webengine that is still broken
-
 RUN_DEPENDS=	lame:audio/lame \
 		${PYTHON_PKGNAMEPREFIX}pyaudio>0:audio/py-pyaudio@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}sqlite3>0:databases/py-sqlite3@${PY_FLAVOR} \

games/anki/files/patch-aqt_qt.py

@@ -1,6 +1,14 @@
 --- aqt/qt.py.orig	2019-03-09 22:22:42 UTC
 +++ aqt/qt.py
-@@ -42,7 +42,7 @@ qtmajor = (QT_VERSION & 0xff0000) >> 16
+@@ -14,6 +14,7 @@ from anki.utils import isWin, isMac
+ from PyQt5.Qt import *
+ # trigger explicit message in case of missing libraries
+ # instead of silently failing to import
++from PyQt5.QtWebChannel import *
+ from PyQt5.QtWebEngineWidgets import *
+ try:
+     from PyQt5 import sip
+@@ -42,7 +43,7 @@ qtmajor = (QT_VERSION & 0xff0000) >> 16
  qtminor = (QT_VERSION & 0x00ff00) >> 8
  qtpoint = QT_VERSION & 0xff