Auto merge of rust-lang#1474 - lpetre:add_utime_constants, r=gnzlbg

Adding UTIME_NOW and UTIME_OMIT to OSes which support utimensat

I've managed to verify a handful of these:

- [FreeBSD](https://github.com/freebsd/freebsd/blob/1d6e4247415d264485ee94b59fdbc12e0c566fd0/tools/build/stat.h#L35)
- [NetBSD](https://github.com/NetBSD/src/blob/64b8a48e1288eb3902ed73113d157af50b2ec596/sys/sys/stat.h#L235)
 - [Apple](https://opensource.apple.com/source/xnu/xnu-4903.221.2/bsd/sys/stat.h.auto.html)

I'm less confident in these:
 - [Haiku](https://github.com/haiku/haiku/blob/abb59d7351c7ddb50c63c40430a82d94fa61917a/headers/posix/sys/stat.h#L105)
   - I could be wrong on this one: https://github.com/haiku/haiku/search?q=UTIME_NOW&unscoped_q=UTIME_NOW
 - [WASI](https://github.com/CraneStation/wasi-libc/blob/24792713d7e31cf593d7e19b943ef0c3aa26ef63/libc-top-half/musl/include/sys/stat.h#L71)
  - I could be wrong on this one: https://github.com/CraneStation/wasi-libc/search?q=UTIME_NOW&unscoped_q=UTIME_NOW
 - [Solarish](https://github.com/illumos/illumos-gate/blob/4e0c5eff9af325c80994e9527b7cb8b3a1ffd1d4/usr/src/uts/common/sys/stat.h#L478)

Auto merge of rust-lang#1467 - gnzlbg:fix_freebsd, r=gnzlbg

Fix FreeBSD

rust-lang#1440 broke FreeBSD by changing `libc` FreeBSD targets to require a `cfg(freebsdXX)` to be defined, but not updating `build.rs` to define `freebsd11` when `LIBC_CI` is not available. Since `LIBC_CI` is always defined on CI, this issue went undetected.

This PR fixes that issue in the `build.rs` and introduces a build task that tests FreeBSD without `LIBC_CI` on FreeBSD11, although I'm  not sure this would have caught the issue in rust-lang#1466 .

Closes rust-lang#1466 .

Auto merge of rust-lang#1464 - gnzlbg:azure_nitpicks, r=gnzlbg

Update README Azure badge to rust-lang2 org

Bump patch version to 0.2.60

Auto merge of rust-lang#1430 - gnzlbg:bump_v, r=gnzlbg

Bump patch version

Auto merge of rust-lang#1384 - gnzlbg:upgrade_rlimit_consts, r=gnzlbg

Upgrade rlimit consts

cc @aidanhs - this should fix the error you are seeing.

Merge pull request rust-lang#1382 from gnzlbg/rlimit_consts

Fix type of RLIMIT consts on linux gnu

Auto merge of rust-lang#1380 - gnzlbg:missing_tiors485, r=gnzlbg

Add missing TIOCGRS485, TIOCSRS485 constants to Linux

Closes rust-lang#1094 .

Auto merge of rust-lang#1345 - jackpot51:patch-1, r=gnzlbg

Bump version to 0.2.55

This will bring in support for redox as part of the unix target_family, thus allowing rust-lang/rust#60547 to move forward

Auto merge of rust-lang#1331 - gnzlbg:revert_1322, r=alexcrichton

Revert PR 1322

Reverts PR rust-lang#1322 .

cc rust-lang/rust#60117