bpf-program: export hash_ops for BPFProgam objects

src/shared/bpf-program.c

@@ -36,6 +36,8 @@ static const char *const bpf_cgroup_attach_type_table[__MAX_BPF_ATTACH_TYPE] = {
 
 DEFINE_STRING_TABLE_LOOKUP(bpf_cgroup_attach_type, int);
 
+DEFINE_HASH_OPS_WITH_KEY_DESTRUCTOR(bpf_program_hash_ops, void, trivial_hash_func, trivial_compare_func, bpf_program_unref);
+
  /* struct bpf_prog_info info must be initialized since its value is both input and output
   * for BPF_OBJ_GET_INFO_BY_FD syscall. */
 static int bpf_program_get_info_by_fd(int prog_fd, struct bpf_prog_info *info, uint32_t info_len) {