Use bpf_prog_load function from ljsyscall module in LuaJIT compiler

At various points in the compiler code, an attempt to load the BPF
program is made. In order to do this, a bpf() syscall needs to happen
with BPF_PROG_LOAD as the first argument (Consult the bpf man page,
under the 'eBPF programs' section). The module ljsyscall does
this via the bpf_prog_load function.

At the time of writing, this function is declared in the file:

syscall/linux/syscalls.lua

In the repo:

https://github.com/justincormack/ljsyscall.git

src/lua/bpf/bpf.lua

@@ -1475,7 +1475,7 @@ local tracepoint_mt = {
  prog = compile(prog, {proto.type(t.type, {source='ptr_to_probe'})})
  end
  -- Load the BPF program
- local prog_fd, err, log = S.bcc_prog_load(S.c.BPF_PROG.TRACEPOINT, prog.insn, prog.pc)
+ local prog_fd, err, log = S.bpf_prog_load(S.c.BPF_PROG.TRACEPOINT, prog.insn, prog.pc)
  assert(prog_fd, tostring(err)..': '..tostring(log))
  -- Open tracepoint and attach
  t.reader:setbpf(prog_fd:getfd())
@@ -1499,7 +1499,7 @@ local function trace_bpf(ptype, pname, pdef, retprobe, prog, pid, cpu, group_fd)
  if type(prog) ~= 'table' then
  prog = compile(prog, {proto.pt_regs})
  end
- local prog_fd, err, log = S.bcc_prog_load(S.c.BPF_PROG.KPROBE, prog.insn, prog.pc)
+ local prog_fd, err, log = S.bpf_prog_load(S.c.BPF_PROG.KPROBE, prog.insn, prog.pc)
  assert(prog_fd, tostring(err)..': '..tostring(log))
  -- Open tracepoint and attach
  local tp, err = S.perf_probe(ptype, pname, pdef, retprobe)
@@ -1580,7 +1580,7 @@ return setmetatable({
  if type(prog) ~= 'table' then
  prog = compile(prog, {proto.skb})
  end
- local prog_fd, err, log = S.bcc_prog_load(S.c.BPF_PROG.SOCKET_FILTER, prog.insn, prog.pc)
+ local prog_fd, err, log = S.bpf_prog_load(S.c.BPF_PROG.SOCKET_FILTER, prog.insn, prog.pc)
  assert(prog_fd, tostring(err)..': '..tostring(log))
  assert(sock:setsockopt('socket', 'attach_bpf', prog_fd:getfd()))
  return prog_fd, err