ebpf: added patch to compile ebpf module for arm

ebpf_prog/README

@@ -17,3 +17,13 @@ cd ../../../daemon
 --start opensnitchd with:
 
 opensnitchd -rules-path /etc/opensnitchd/rules -process-monitor-method ebpf
+
+The kernel where you intend to run it must have some options activated:
+
+$ grep BPF /boot/config-$(uname -r)
+CONFIG_CGROUP_BPF=y
+CONFIG_BPF=y
+CONFIG_BPF_SYSCALL=y
+CONFIG_BPF_EVENTS=y
+CONFIG_KPROBES=y
+CONFIG_KPROBE_EVENTS=y

ebpf_prog/arm-clang-asm-fix.patch

@@ -0,0 +1,14 @@
+--- ../../arch/arm/include/asm/unified.h	2021-04-20 10:47:54.075834124 +0000
++++ ../../arch/arm/include/asm/unified-clang-fix.h	2021-04-20 10:47:38.943811970 +0000
+@@ -11,7 +11,10 @@
+ #if defined(__ASSEMBLY__)
+ 	.syntax unified
+ #else
+-__asm__(".syntax unified");
++//__asm__(".syntax unified");
++#ifndef __clang__
++	__asm__(".syntax unified");
++#endif
+ #endif
+ 
+ #ifdef CONFIG_CPU_V7M