Stop using __DATE__/__TIME__ on all builds

We're beginning to use remote caches with Android builds, so I'm turning
on -Werror=date-time so that host builds are also reproducible.

Test: treehugger
Test: mmma external/libavc
Change-Id: I581f3abf528a7bb5df6ee9963f4d72e2b4bb8a6c
2 files changed