bump gcc and llvm with a few updates

- gcc cherry-picked https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=110ffb2d8d3a64b32dd56ac995c2e30e8f64d4dc
- llvm rebased on https://github.com/llvm/llvm-project/commit/b7eba056b93cc396807dabf62b23bce86ec9223a



Signed-off-by: Huaqi Fang <578567190@qq.com>