gdk-pixbuf: upgrade 2.42.11 -> 2.42.12

gdk-pixbuf: upgrade 2.42.11 -> 2.42.12

- Fix a build failure (Christian Heusel)
- Fix occasional build failures (Benjamin Gilbert)
- ani: Reject files with multiple INA or IART chunks (Benjamin Gilbert)
- ani: Reject files with multiple anih chunks (Benjamin Gilbert, CVE-2022-48622)
- ani: validate chunk size (Benjamin Gilbert)
- Translation updates

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>