bpftools: update to standalone bpftools + libbpf, use the latest version

Signed-off-by: Felix Fietkau <nbd@nbd.name>

package/network/utils/bpftools/patches/002-includes.patch

@@ -0,0 +1,26 @@
+--- a/libbpf/include/linux/list.h
++++ b/libbpf/include/linux/list.h
+@@ -3,6 +3,8 @@
+ #ifndef __LINUX_LIST_H
+ #define __LINUX_LIST_H
+ 
++#include <linux/types.h>
++
+ #define LIST_HEAD_INIT(name) { &(name), &(name) }
+ #define LIST_HEAD(name) \
+         struct list_head name = LIST_HEAD_INIT(name)
+--- a/src/Makefile
++++ b/src/Makefile
+@@ -73,10 +73,10 @@ CFLAGS += -W -Wall -Wextra -Wno-unused-p
+ CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS))
+ CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \
+ 	-I$(if $(OUTPUT),$(OUTPUT),.) \
+-	-I$(LIBBPF_INCLUDE) \
+ 	-I$(srctree)/src/kernel/bpf/ \
+ 	-I$(srctree)/include \
+-	-I$(srctree)/include/uapi
++	-I$(srctree)/include/uapi \
++	-I$(LIBBPF_INCLUDE)
+ ifneq ($(BPFTOOL_VERSION),)
+ CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
+ endif