libxml2: upgrade 2.14.5 -> 2.14.6
(From OE-Core rev: 28af77eea6fe04c923d57b8b20ad24414ffc8621)
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>