Fix errors when compiling C source files into eBPF bytecode.

[weixiang1862]

When I execute make generate on my system with Linux headers version 6.2 or higher, I got the following error:

skywalking-rover/bpf/include/list.h:65:8: error: redefinition of 'bpf_list_head'
   65 | struct bpf_list_head {
      |        ^
/usr/include/linux/bpf.h:7136:8: note: previous definition is here
 7136 | struct bpf_list_head {
      |        ^

I followed @mrproliu advice to add a prefix for bpf_list_head struct, it generate go file successfuly, I tested it in my local, it works well, Thanks for your help @mrproliu .