call it musl 1.2.0?

[Rich Felker <dalias@libc.org>]

An idea crossed my mind today regarding the time64 conversion: should
we call the first release with it switched over musl 1.2.0 instead of
1.1.25? This would both reflect that there's something ABI-significant
(and a big functional milestone) about the release, and would admit
keeping a 1.1.x branch around for a while with backports of any major
bug fixes, since there will probably be some users hesitant to switch
over to 64-bit time_t right away before it's well-tested.

Looking at the roadmap goals that were set for 1.2.0 a while (a couple
years?) back now, most of them have been met:

- Out-of-tree builds
- Deduplication and cleanup of bits header system
- Deduplication of atomic asm logic
- AArch64 port
- RISC-V 64 port
- Significant improvement to previously-buggy/experimental archs
- External _FORTIFY_SOURCE implementation available
- External nss replacement available
- Unicode (mostly?) up-to-date

The ones that have not been met are:

- Locale overhaul (lots of subpoints)
- IDN support
- All documentation goals
- Midipix

All except which are (to say the least) somewhat drawn-out goals with
no end in sight.

Adding "64-bit time_t on 32-bit archs" to the above completed list,
and possibly also adding experimental riscv32, it sounds pretty
1.2.0-worthy to me.

Thoughts on this?

Rich