Update localtime.c.

This brings us closer to upstream's ToT localtime.c; our main interest
being their alternative fix for the stack usage we addressed in commit
8a8b0c9bfcd80c67154ed2aca1e60d815c822acb.

Bug: 14468519
Change-Id: Ic28600115afda7f3158d91255edf422678bac082
1 file changed