Ensure the system boots with a halfway sane time/date

Just in case the kernel or vendor glue don't initialize the system time
sensibly, we now make sure the current time at boot is at least up to the
build time of the system disk image.

Bug 36736983
Test: manual

Change-Id: I46f776300ca4f5ad01396fc17c83fc833e1713f9
1 file changed