[clang] [clang] replaced the usage of `asctime` with `std::put_time` (PR #99075)

[Rainer Orth via cfe-commits]

rorth wrote:

> > At least in the short term. ISTM that `clang++` may need to do something along the lines of Bug 33767 (resp. the underlying GCC bug/patch), otherwise users are in for a nasty surprise.
> 
> Agreed; long-term we need a better solution. Hopefully someone maintaining Solaris support can step in and help there, because this is quite surprising behavior.

The cleaned-up hack is in the final rounds of testing.  Wlll create a PR once that's done.

There's no real Solaris maintainer AFAIK: while I do run the buildbots and try to keep the port in shape as time allows, I can only do so much.  The Solaris GCC maintainership takes enough of my time and splitting it would only be to the detriment of both projects.

TBH, I wouldn't even know where to look: I've mostly dealt with `compiler-rt` and driver issues so far.

https://github.com/llvm/llvm-project/pull/99075