examples: include common.h in bpf_helpers.h

clang-format re-orders common.h to be included after bpf_helper_defs.h,
which is not possible due to the latter depending on __u64.

Include common.h at the start of bpf_helpers.h instead.

Signed-off-by: Timo Beckers <timo@isovalent.com>

Author: ti-mo

examples/cgroup_skb/cgroup_skb.c

@@ -1,6 +1,5 @@
 // +build ignore
 
-#include "common.h"
 #include "bpf_helpers.h"
 
 char __license[] SEC("license") = "Dual MIT/GPL";

examples/headers/bpf_helpers.h

@@ -8,6 +8,7 @@
  * in advance since bpf_helper_defs.h uses such types
  * as __u64.
  */
+#include "common.h"
 #include "bpf_helper_defs.h"
 
 #define __uint(name, val) int (*name)[val]

examples/kprobe/kprobe.c

@@ -1,6 +1,5 @@
 // +build ignore
 
-#include "common.h"
 #include "bpf_helpers.h"
 
 char __license[] SEC("license") = "Dual MIT/GPL";

examples/kprobepin/kprobe_pin.c

@@ -1,6 +1,5 @@
 // +build ignore
 
-#include "common.h"
 #include "bpf_helpers.h"
 
 char __license[] SEC("license") = "Dual MIT/GPL";