libubox: update to git HEAD

 cce5e35 vlist: define vlist_for_each_element_safe

This is change affects only a macro in headers and hence it is not
required to bump ABI_VERSION.

Signed-off-by: Daniel Golle <[email protected]>

package/libs/libubox/Makefile

@@ -1,13 +1,13 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libubox
-PKG_RELEASE=2
+PKG_RELEASE=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/libubox.git
-PKG_MIRROR_HASH:=7ea3c04e8d274bfc99789f9880c97aead9013095d2ac6dc4fcbee47fc533f3a9
-PKG_SOURCE_DATE:=2021-11-04
-PKG_SOURCE_VERSION:=c86a894ec63d83ecf2c373bbf9dc8fba9713d942
+PKG_MIRROR_HASH:=ae02e1539ea6af072e39ce0d7179806c98eb29188c233be44226118f4c4271ee
+PKG_SOURCE_DATE:=2021-11-20
+PKG_SOURCE_VERSION:=cce5e351278b307af7f69931971e3d4e060117d7
 PKG_ABI_VERSION:=$(call abi_version_str,$(PKG_SOURCE_DATE))
 CMAKE_INSTALL:=1