n1: Add SHA1 hash to filesmap

* New releasetools relies on SHA1 hash to prevent flashing partitions
  when unnecessary.

Change-Id: I3c75722d1043d11ca5ea3b5a4a5241e7b1989c6e
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_device_oppo_n1 into cd-4.4