How to generate BPF code(`sock_fprog`) through bcc?

Hi, I am planning to generate the BPF "assembly" code(`BPF_JUMP`, `BPF_STMT` etc.) by writing C or Python code.
```
struct sock_filter filter[] = {
BPF_STMT(BPF_LD+BPF_W+BPF_ABS, (offsetof(struct seccomp_data, nr))),
BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, __NR_prctl, 0, 1),
BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_ALLOW),
BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, __NR_write, 0, 1),
BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_ALLOW),
BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_KILL),
};
```

I was wondering if bcc could provide such interfaces to users. Since what I have found is all about higher API (like tracing), Thanks~

The issue names no files or tests; start by reviewing BCC's existing higher-level tracing APIs and the requested sock_fprog, BPF_STMT, and BPF_JUMP interfaces. Done would require a decided, supported interface for generating this code, along with coverage or documentation showing how users should use it.

Written by the indexing model from the issue text.