xml2: Import upstream release 2.10.0.
wine commit id 015491ab32742ace5218d37b1149c58803858214 by Alexandre Julliard <julliard@winehq.org>
Note: Upstream msxml3_test has switched away from WINE_NO_LONG_TYPES, so
I've kept the old printf format specifiers for now. Once we do a full
sync, we can get rid of __ROS_LONG64__ for this test and use them
unmodified.