add dependency on include files

Author: koonwen

examples/dune

@@ -33,7 +33,11 @@
  (mode
   (promote (until-clean)))
  (targets tc.bpf.o)
- (deps arch vmlinux.h tc.bpf.c)
+ (deps
+  arch
+  vmlinux.h
+  tc.bpf.c
+  %{project_root}/src/root/usr/include/bpf/bpf_helpers.h)
  (action
   (system
    "clang -g -O2 -target bpf -I%{project_root}/src/root/usr/include/ -I/usr/include/%{architecture}-linux-gnu/ -c tc.bpf.c  -D__TARGET_ARCH_%{read:arch}")))