libxml2: update to 2.13.4

Release Notes:
https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.13.0
https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.13.1
https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.13.2
https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.13.3
https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.13.4

Small size reduction:
415095 bin/packages/mips_24kc-old/base/libxml2_2.12.6-r1_mips_24kc.ipk
 87175 bin/packages/mips_24kc-old/base/libxml2-dev_2.12.6-r1_mips_24kc.ipk
 20190 bin/packages/mips_24kc-old/base/libxml2-utils_2.12.6-r1_mips_24kc.ipk
398070 bin/packages/mips_24kc-new/base/libxml2_2.13.4-r1_mips_24kc.ipk
 86760 bin/packages/mips_24kc-new/base/libxml2-dev_2.13.4-r1_mips_24kc.ipk
 19479 bin/packages/mips_24kc-new/base/libxml2-utils_2.13.4-r1_mips_24kc.ipk

Link: https://github.com/openwrt/openwrt/pull/16593
Signed-off-by: Hauke Mehrtens <[email protected]>

package/libs/libxml2/Makefile

@@ -1,12 +1,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libxml2
-PKG_VERSION:=2.12.9
+PKG_VERSION:=2.13.4
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=@GNOME/libxml2/$(basename $(PKG_VERSION))
-PKG_HASH:=59912db536ab56a3996489ea0299768c7bcffe57169f0235e7f962a91f483590
+PKG_HASH:=65d042e1c8010243e617efb02afda20b85c2160acdbfbcb5b26b80cec6515650
 
 PKG_LICENSE:=MIT
 PKG_LICENSE_FILES:=COPYING