llvm-project

a2875553 - [libc++] Fix `gps_time` formatting and related tests (#181560)

[libc++] Fix `gps_time` formatting and related tests (#181560) - The Standard wording in https://eel.is/c++draft/time.format#13 is similar to TAI formatting in that it's equivalent to formatting a `sys_time` with a fixed offset. Leap seconds should not be considered. - Tests need to be adjusted by adding the number of leap seconds between the GPS epoch and the tested date, which is 15s for 2010 and 18s for 2019. - The TAI and GPS tests using `meow_time<cr::duration<long, ...>>` should use `long long` because the offset swill overflow a 32-bit signed integer.