[llvm] [libc] add multi-platform pre-commit github actions (PR #119104)

[Schrodinger ZHU Yifan via llvm-commits]

SchrodingerZhu wrote:

> I'm not sure what kind of errors you are seeing

```
Post job cleanup.
Get human-readable stats
Get JSON stats
Notice: 0% - 0 hits, 5527 misses, 0 errors
Full human-readable stats:
Compile requests                   5527
Compile requests executed          5527
Cache hits                            0
Cache misses                       5527
Cache misses (C/C++)               5527
Cache hits rate                    0.00 %
Cache hits rate (C/C++)            0.00 %
Cache timeouts                        0
Cache read errors                     0
Forced recaches                       0
Cache write errors                 5527
Compilation failures                  0
Cache errors                          0
Non-cacheable compilations            0
Non-cacheable calls                   0
Non-compilation calls                 0
Unsupported compiler calls            0
Average cache write               0.000 s
Average compiler                  0.942 s
Average cache read hit            0.000 s
Failed distributed compilations       0
Cache location                  ghac, name: sccache-v0.8.2, prefix: /sccache/
Version (client)                0.8.2
```
There is a `Cache write errors                 5527` in statistics.


https://github.com/llvm/llvm-project/pull/119104