Add time_genoff.h needed by QC time daemon

This should have been included as part of
https://gerrit.omnirom.org/#/c/3532/

Devices that enable the time daemon fail to build without this.

Change-Id: I31a8f71af6f76ed526040ba5ff93a680e124ba4a
Merge remote-tracking branch 'cm/android-4.4' into android-4.4