libubox: update to the latest version

d716ac4bc423 list.h: add a few missing iterator macros

Signed-off-by: Felix Fietkau <[email protected]>

package/libs/libubox/Makefile

@@ -5,9 +5,9 @@ PKG_RELEASE=2
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/libubox.git
-PKG_MIRROR_HASH:=7dd1db1e0074a9c7c722db654cce3111b3bd3cff0bfd791c4497cb0f6c22d3ca
-PKG_SOURCE_DATE:=2021-05-16
-PKG_SOURCE_VERSION:=b14c4688612c05c78ce984d7bde633bce8703b1e
+PKG_MIRROR_HASH:=1cdb91ac0ee925f133ee9f70eac131a99def312fe7cf0aed44df84eb1762e30b
+PKG_SOURCE_DATE:=2021-08-19
+PKG_SOURCE_VERSION:=d716ac4bc4236031d4c3cc1ed362b502e20e3787
 PKG_ABI_VERSION:=$(call abi_version_str,$(PKG_SOURCE_DATE))
 CMAKE_INSTALL:=1