[compiler-rt] [sanitizer] Undef _TIME_BITS along with _FILE_OFFSET_BITS (PR #99699)

[Rainer Orth via llvm-commits]

https://github.com/rorth commented:

Although I appreciate having a comment here, this seems way too long to me.  Maybe something like
```
Avoid conflict between `_TIME_BITS` defined vs. `_FILE_OFFSET_BITS` undefined in some Linux configurations.
```
or something like this.  Certainly not more than a line or two.

This won't affect Solaris at all: its headers contain no reference to `_TIME_BITS` whatsoever.

https://github.com/llvm/llvm-project/pull/99699